Metal chloride solid-state electrolytes and all-solid-state batteries： State-of-the-art developments and perspectives

doi:10.19799/j.cnki.2095-4239.2023.0821

Abstract

Abstract:

Solid-state batteries based on inorganic solid electrolytes with high energy density, long cycle life, and good safety are highly competitive candidates for the next generation of electrochemical energy storage systems. The key to achieving high-performance solid-state batteries is designing and fabricating solid electrolytes with high ionic conductivity, stable interfaces, and deformability. Metal chloride solid electrolytes (MCSEs), emerging as a novel material system, possess anti-oxidation stability of oxide solid electrolytes and high ionic conductivity and mechanical ductility of sulfide solid electrolytes. The fabrication process is simple and requires neither stringent environmental conditions nor extremely high sintering temperatures. It has substantial potential for scalable production, making it one of the most promising choices for commercializing solid-state batteries. This article, through an in-depth analysis of solid electrolyte research progress in the past five years, systematically reviews the research status of MCSEs. These aspects encompass synthesis methodologies, crystal structure studies, ion conduction mechanisms, performance optimization strategies, electrode-electrolyte interfaces, and the potential for practical applications. In addition, the future development directions of MCSEs and potential approaches to address interface issues are discussed, laying the theoretical and experimental foundations for developing high-performance solid-state lithium batteries based on MCSEs.

Key words: metal chlorides, solid-state electrolyte, ion conduction mechanism, all-solid-state batteries

CLC Number:

TM 911

Feng LI, Xiaobin CHENG, Jinda LUO, Hongbin YAO. Metal chloride solid-state electrolytes and all-solid-state batteries： State-of-the-art developments and perspectives[J]. Energy Storage Science and Technology, 2024, 13(1): 193-211.

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Table 1

References 96

1	KATO Y, HORI S, SAITO T, et al. High-power all-solid-state batteries using sulfide superionic conductors[J]. Nature Energy, 2016, 1: 16030.
2	KOOHI-FAYEGH S, ROSEN M A. A review of energy storage types, applications and recent developments[J]. Journal of Energy Storage, 2020, 27: 101047.
3	CHOI D, SHAMIM N, CRAWFORD A, et al. Li-ion battery technology for grid application[J]. Journal of Power Sources, 2021, 511: 230419.
4	JANEK J, ZEIER W G. A solid future for battery development[J]. Nature Energy, 2016, 1: 16141.
5	KORTHAUER R. Handbuch Lithium-Ionen-Batterien[M]. Berlin, Heidelberg: Springer Berlin Heidelberg: 2013.
6	ZHANG Y, ZUO T T, POPOVIC J, et al. Towards better Li metal anodes: Challenges and strategies[J]. Materials Today, 2020, 33: 56-74.
7	ALBRTUS P, ANANDAN V, BAN C, et al. Challenges for and pathways toward Li-metal-based all-solid-state batteries[J]. ACS Energy Lett, 2021, 6, 4: 1399-1404.
8	MA X T, AZHARI L, WANG Y. Li-ion battery recycling challenges[J]. Chem, 2021, 7(11): 2843-2847.
9	FANG C C, WANG X F, MENG Y S. Key issues hindering a practical lithium-metal anode[J]. Trends in Chemistry, 2019, 1(2): 152-158.
10	MANTHIRAM A, YU X W, WANG S F. Lithium battery chemistries enabled by solid-state electrolytes[J]. Nature Reviews Materials, 2017, 2: 16103.
11	HU Y S. Batteries: Getting solid[J]. Nature Energy, 2016, 1: 16042.
12	CHEN R S, LI Q H, YU X Q, et al. Approaching practically accessible solid-state batteries: Stability issues related to solid electrolytes and interfaces[J]. Chemical Reviews, 2020, 120(14): 6820-6877.
13	LEWIS J A, TIPPENS J, CORTES F J Q, et al. Chemo-mechanical challenges in solid-state batteries[J]. Trends in Chemistry, 2019, 1(9): 845-857.
14	KASEMCHAINAN J, BRUCE P G. All-solid-state batteries and their remaining challenges[J]. Johnson Matthey Technology Review, 2018, 62(2): 177-180.
15	KERMAN K, LUNTZ A, VISWANATHAN V, et al. Review—Practical challenges hindering the development of solid state Li ion batteries[J]. Journal of the Electrochemical Society, 2017, 164(7): A1731-A1744.
16	PASTA M, ARMSTRONG D, BROWN Z, et al. 2020 roadmap on solid-state batteries[J]. J. Phys: Energy. 2020, 2(3): 032008.
17	FAMPRIKIS T, CANEPA P, DAWSON J A, et al. Fundamentals of inorganic solid-state electrolytes for batteries[J]. Nature Materials, 2019, 18(12): 1278-1291.
18	ZHAO Q, STALIN S, ZHAO C Z, et al. Designing solid-state electrolytes for safe, energy-dense batteries[J]. Nature Reviews Materials, 2020, 5(3): 229-252.
19	WANG C W, FU K, KAMMAMPATA S P, et al. Garnet-type solid-state electrolytes: Materials, interfaces, and batteries[J]. Chemical Reviews, 2020, 120(10): 4257-4300.
20	JIAN Z L, HU Y S, JI X L, et al. NASICON-structured materials for energy storage[J]. Advanced Materials, 2017, 29(20): 1601925.
21	ZHENG J F, PERRY B, WU Y Y. Antiperovskite superionic conductors: A critical review[J]. ACS Materials Au, 2021, 1(2): 92-106.
22	XIA W, ZHAO Y, ZHAO F P, et al. Antiperovskite electrolytes for solid-state batteries[J]. Chemical Reviews, 2022, 122(3): 3763-3819.
23	KANNO R, MURAYAMA M. Lithium ionic conductor thio-LISICON: The Li₂S-GeS₂-P₂S₅ system[J]. Journal of the Electrochemical Society, 2001, 148(7): A742.
24	MINAFRA N, CULVER S P, KRAUSKOPF T, et al. Effect of Si substitution on the structural and transport properties of superionic Li-argyrodites[J]. Journal of Materials Chemistry A, 2018, 6(2): 645-651.
25	KAMAYA N, HOMMA K, YAMAKAWA Y, et al. A lithium superionic conductor[J]. Nature Materials, 2011, 10(9): 682-686.
26	OHARA K, MITSUI A, MORI M, et al. Structural and electronic features of binary Li₂S-P₂S₅ glasses[J]. Scientific Reports, 2016, 6: 21302.
27	WENZEL S, WEBER D A, LEICHTWEISS T, et al. Interphase formation and degradation of charge transfer kinetics between a lithium metal anode and highly crystalline Li₇P₃S₁₁ solid electrolyte[J]. Solid State Ionics, 2016, 286: 24-33.
28	WANG Y, RICHARDS W D, ONG S P, et al. Design principles for solid-state lithium superionic conductors[J]. Nature Materials, 2015, 14(10): 1026-1031.
29	HAN X G, GONG Y H, FU K, et al. Negating interfacial impedance in garnet-based solid-state Li metal batteries[J]. Nature Materials, 2017, 16(5): 572-579.
30	NIKODIMOS Y, HUANG C J, TAKLU B W, et al. Chemical stability of sulfide solid-state electrolytes: Stability toward humid air and compatibility with solvents and binders[J]. Energy & Environmental Science, 2022, 15(3): 991-1033.
31	HE B J, ZHANG F, XIN Y, et al. Halogen chemistry of solid electrolytes in all-solid-state batteries[J]. Nature Reviews Chemistry, 2023: 1-17.
32	ASANO T, SAKAI A, OUCHI S, et al. Solid halide electrolytes with high lithium-ion conductivity for application in 4 V class bulk-type all-solid-state batteries[J]. Advanced Materials, 2018, 30(44): 1803075.
33	WANG S, BAI Q, NOLAN A M, et al. Lithium chlorides and bromides as promising solid-state chemistries for fast ion conductors with good electrochemical stability[J]. Angewandte Chemie (International Ed in English), 2019, 58(24): 8039-8043.
34	RICHARDS W D, MIARA L J, WANG Y, et al. Interface stability in solid-state batteries[J]. Chemistry of Materials, 2016, 28(1): 266-273.
35	ZHU Y Z, HE X F, MO Y F. Origin of outstanding stability in the lithium solid electrolyte materials: Insights from thermodynamic analyses based on first-principles calculations[J]. ACS Applied Materials & Interfaces, 2015, 7(42): 23685-23693.
36	WANG C H, LIANG J W, LUO J, et al. A universal wet-chemistry synthesis of solid-state halide electrolytes for all-solid-state lithium-metal batteries[J]. Science Advances, 2021, 7(37): eabh1896.
37	LI X N, LIANG J W, CHEN N, et al. Water-mediated synthesis of a superionic halide solid electrolyte[J]. Angewandte Chemie, 2019, 131(46): 16579-16584.
38	KANNO R, TAKEDA Y, TAKAHASHI A, et al. New double chloride in the LiCl-CoCl₂ system[J]. Journal of Solid State Chemistry, 1987, 71(1): 196-204.
39	KANNO R, TAKEDA Y, YAMAMOTO O, et al. ChemInform abstract: Ionic conductivity and phase transition of the bromide spinels, Li_2-2 xM₁₊ xBr₄ (M: Mg, Mn)[J]. Chemischer Informationsdienst, 1986, 17(39): 1052.
40	KUSKE P, SCHÄFER W, LUTZ H D. Neutron diffraction studies on spinel type Li₂ZnCl₄[J]. Materials Research Bulletin, 1988, 23(12): 1805-1808.
41	LUTZ H D, SCHMIDT W, HAEUSELER H. Phase relationships of the lithium halide spinels Li₂ MCl₄-Li₂ MBr₄ with M = Mn, Fe, Cd[J]. Journal of Solid State Chemistry, 1985, 56(1): 21-25.
42	SCHMIDT W, LUTZ H. Fast ionic conductivity and dielectric properties of the lithium halide spinels Li₂MnCl₄, Li₂CdCl₄, Li₂MnBr₄, and Li₂CdBr₄[J]. Ber. Bunsen-Ges. Phys. Chem., 1984, 88(8): 720-723.
43	KANNO R, TAKEDA Y, MATSUMOTO A, et al. Synthesis, structure, ionic conductivity, and phase transformation of new double chloride spinel, Li₂CrCl₄[J]. Journal of Solid State Chemistry, 1988, 75(1): 41-51.
44	KENNEDY J H, ZHANG Z M, ECKERT H. Ionically conductive sulfide-based lithium glasses[J]. Journal of Non-Crystalline Solids, 1990, 123(1/2/3): 328-338.
45	LIANG J W, LI X N, WANG S, et al. Site-occupation-tuned superionic LixScCl₃₊ xHalide solid electrolytes for all-solid-state batteries[J]. Journal of the American Chemical Society, 2020, 142(15): 7012-7022.
46	SCHLEM R, MUY S, PRINZ N, et al. Mechanochemical synthesis: A tool to tune cation site disorder and ionic transport properties of Li₃MCl₆ (M=Y, Er) superionic conductors[J]. Advanced Energy Materials, 2020, 10(6): 1903719.
47	KWAK H, HAN D, LYOO J, et al. All-solid-state batteries: New cost-effective halide solid electrolytes for all-solid-state batteries: Mechanochemically prepared Fe³⁺-substituted Li₂ZrCl₆[J]. Advanced Energy Materials, 2021, 11(12): 2003190.
48	WANG K, REN Q Y, GU Z Q, et al. A cost-effective and humidity-tolerant chloride solid electrolyte for lithium batteries[J]. Nature Communications, 2021, 12(1): 4410.
49	LI F, CHENG X B, LU L L, et al. Stable all-solid-state lithium metal batteries enabled by machine learning simulation designed halide electrolytes[J]. Nano Letters, 2022, 22(6): 2461-2469.
50	ZHOU L D, KWOK C Y, SHYAMSUNDER A, et al. A new halospinel superionic conductor for high-voltage all solid state lithium batteries[J]. Energy & Environmental Science, 2020, 13(7): 2056-2063.
51	ZHOU L D, ZUO T T, KWOK C Y, et al. High areal capacity, long cycle life 4 V ceramic all-solid-state Li-ion batteries enabled by chloride solid electrolytes[J]. Nature Energy, 2022, 7(1): 83-93.
52	FU J M, WANG S, LIANG J W, et al. Superionic conducting halide frameworks enabled by interface-bonded halides[J]. Journal of the American Chemical Society, 2023, 145(4): 2183-2194.
53	YIN Y C, YANG J T, LUO J D, et al. A LaCl₃-based lithium superionic conductor compatible with lithium metal[J]. Nature, 2023, 616(7955): 77-83.
54	CHEN S, YU C, CHEN S Q, et al. Enabling ultrafast lithium-ion conductivity of Li₂ZrCl₆ by indium doping[J]. Chinese Chemical Letters, 2022, 33(10): 4635-4639.
55	FU J Z, YANG S G, HOU J H, et al. Modeling assisted synthesis of Zr-doped Li_3- xIn_1- xZrxCl₆ with ultrahigh ionic conductivity for lithium-ion batteries[J]. Journal of Power Sources, 2023, 556: 232465.
56	JUNG S K, GWON H, YOON G, et al. Pliable lithium superionic conductor for all-solid-state batteries[J]. ACS Energy Letters, 2021, 6(5): 2006-2015.
57	XU R N, YAO J M, ZHANG Z Q, et al. Room temperature halide-eutectic solid electrolytes with viscous feature and ultrahigh ionic conductivity[J]. Advanced Science, 2022, 9(35): 2204633.
58	TANAKA Y, UENO K, MIZUNO K, et al. New oxyhalide solid electrolytes with high lithium ionic conductivity >10 mS/cm for all-solid-state batteries[J]. Angewandte Chemie (International Ed in English), 2023, 62(13): e202217581.
59	BURMEISTER C F, KWADE A. Process engineering with planetary ball Mills[J]. Chemical Society Reviews, 2013, 42(18): 7660-7667.
60	LI X N, LIANG J W, LUO J, et al. Air-stable Li₃InCl₆ electrolyte with high voltage compatibility for all-solid-state batteries[J]. Energy & Environmental Science, 2019, 12(9): 2665-2671.
61	KIM S Y, KAUP K, PARK K H, et al. Lithium ytterbium-based halide solid electrolytes for high voltage all-solid-state batteries[J]. ACS Materials Letters, 2021, 3(7): 930-938.
62	PAULING L. The principles determining the structure of complex ionic crystals[J]. Journal of the American Chemical Society, 1929, 51(4): 1010-1026.
63	SHANNON R D. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides[J]. Acta Crystallographica Section A, 1976, 32(5): 751-767.
64	WANG C H, LIANG J W, KIM J T, et al. Prospects of halide-based all-solid-state batteries: From material design to practical application[J]. Science Advances, 2022, 8(36): eadc9516.
65	LISSNER F, KRÄMER K, SCHLEID T, et al. Die chloride Na₃ xM_2- xCl₆ (M=La, Sm) und NaM₂Cl₆ (M=Nd, Sm): Derivate des UCl₃-typs. synthese, kristallstruktur und röntgenabsorptionsspektroskopie (XANES)[J]. Zeitschrift Für Anorganische Und Allgemeine Chemie, 1994, 620(3): 444-450.
66	PARK K H, KAUP K, ASSOUD A, et al. High-voltage superionic halide solid electrolytes for all-solid-state Li-ion batteries[J]. ACS Energy Letters, 2020, 5(2): 533-539.
67	LIU Z T, MA S A, LIU J E, et al. High ionic conductivity achieved in Li₃Y(Br₃Cl₃) mixed halide solid electrolyte via promoted diffusion pathways and enhanced grain boundary[J]. ACS Energy Letters, 2021, 6(1): 298-304.
68	KWAK H, WANG S, PARK J, et al. Emerging halide superionic conductors for all-solid-state batteries: Design, synthesis, and practical applications[J]. ACS Energy Letters, 2022, 7(5): 1776-1805.
69	KWAK H, KIM J S, HAN D, et al. Boosting the interfacial superionic conduction of halide solid electrolytes for all-solid-state batteries[J]. Nature Communications, 2023, 14: 2459.
70	LI X N, XU Y, ZHAO C T, et al. The universal super cation-conductivity in multiple-cation mixed chloride solid-state electrolytes[J]. Angewandte Chemie International Edition, 2023, 62(48): e202306433.
71	ZHANG S, ZHAO F, CHEN J, et al. A family of oxychloride amorphous solid electrolytes for long-cycling all-solid state lithium batteries[J]. Nat. Commun, 2023, 14(1): 3780.
72	BANERJEE A, WANG X F, FANG C C, et al. Interfaces and interphases in all-solid-state batteries with inorganic solid electrolytes[J]. Chemical Reviews, 2020, 120(14): 6878-6933.
73	XIAO Y H, WANG Y, BO S H, et al. Understanding interface stability in solid-state batteries[J]. Nature Reviews Materials, 2019, 5(2): 105-126.
74	FITZHUGH W, WU F, YE L H, et al. A high-throughput search for functionally stable interfaces in sulfide solid-state lithium ion conductors[J]. Advanced Energy Materials, 2019, 9(21): 1900807.
75	XU L, TANG S, CHENG Y, et al. Interfaces in solid-state lithium batteries[J]. Joule, 2018, 2(10): 1991-2015.
76	JÜRGEN J, ZEIER WOLFGANG G. Challenges in speeding up solid-state battery development[J]. Nature Energy, 2023, 8(3): 230-240.
77	RIEGGER L M, SCHLEM R, SANN J, et al. Lithium-metal anode instability of the superionic halide solid electrolytes and the implications for solid-state batteries[J]. Angewandte Chemie (International Ed in English), 2021, 60(12): 6718-6723.
78	JI W X, ZHENG D, ZHANG X X, et al. A kinetically stable anode interface for Li₃YCl₆-based all-solid-state lithium batteries[J]. Journal of Materials Chemistry A, 2021, 9(26): 15012-15018.
79	PARK C M, KIM J H, KIM H, et al. Li-alloy based anode materials for Li secondary batteries[J]. Chemical Society Reviews, 2010, 39(8): 3115-3141.
80	TAN D H S, CHEN Y T, YANG H D, et al. Carbon-free high-loading silicon anodes enabled by sulfide solid electrolytes[J]. Science, 2021, 373(6562): 1494-1499.
81	HÄNSEL C, SINGH B, KIWIC D, et al. Favorable interfacial chemomechanics enables stable cycling of high-Li-content Li-In/Sn anodes in sulfide electrolyte-based solid-state batteries[J]. Chemistry of Materials, 2021, 33(15): 6029-6040.
82	PAN H, ZHANG M H, CHENG Z, et al. Carbon-free and binder-free Li-Al alloy anode enabling an all-solid-state Li-S battery with high energy and stability[J]. Science Advances, 2022, 8(15): eabn4372.
83	LU Y, ZHAO C Z, ZHANG R, et al. The carrier transition from Li atoms to Li vacancies in solid-state lithium alloy anodes[J]. Science Advances, 2021, 7(38): eabi5520.
84	SHI X M, ZENG Z C, SUN M Z, et al. Fast Li-ion conductor of Li₃HoBr₆ for stable all-solid-state lithium-sulfur battery[J]. Nano Letters, 2021, 21(21): 9325-9331.
85	LI X N, LIANG J W, KIM J T, et al. Highly stable halide-electrolyte-based all-solid-state Li-Se batteries[J]. Advanced Materials, 2022, 34(20): 2200856.
86	PITZER K S. The nature of the chemical bond and the structure of molecules and crystals: An introduction to modern structural chemistry[J]. Journal of the American Chemical Society, 1960, 82(15): 4121.
87	Ashcroft, N., Mermin, N. Solid State Physics, Holt, Rinehart and Winston[J]. New York. 1976, 2005: 403.
88	JANG J, CHEN Y T, DEYSHER G, et al. Enabling a co-free, high-voltage LiNi_0.5Mn_1.5O₄ cathode in all-solid-state batteries with a halide electrolyte[J]. ACS Energy Letters, 2022, 7(8): 2531-2539.
89	NIKODIMOS Y, SU W N, HWANG B J. Halide solid-state electrolytes: Stability and application for high voltage all-solid-state Li batteries[J]. Advanced Energy Materials, 2023, 13(3): 2202854.
90	KOCHETKOV I, ZUO T T, RUESS R, et al. Different interfacial reactivity of lithium metal chloride electrolytes with high voltage cathodes determines solid-state battery performance[J]. Energy & Environmental Science, 2022, 15(9): 3933-3944.
91	LI X N, LIANG J W, YANG X F, et al. Progress and perspectives on halide lithium conductors for all-solid-state lithium batteries[J]. Energy & Environmental Science, 2020, 13(5): 1429-1461.
92	ZHAO F P, ALAHAKOON S H, ADAIR K, et al. An air-stable and Li-metal-compatible glass-ceramic electrolyte enabling high-performance all-solid-state Li metal batteries[J]. Advanced Materials, 2021, 33(8): 2006577.
93	LI X N, LIANG J W, ADAIR K R, et al. Origin of superionic Li₃Y_1– xInxCl₆ halide solid electrolytes with high humidity tolerance[J]. Nano Letters, 2020, 20(6): 4384-4392.
94	LI W H, LIANG J W, LI M S, et al. Unraveling the origin of moisture stability of halide solid-state electrolytes by in situ and Operando synchrotron X-ray analytical techniques[J]. Chemistry of Materials, 2020, 32(16): 7019-7027.
95	KATO Y, SHIOTANI S, MORITA K, et al. All-solid-state batteries with thick electrode configurations[J]. The Journal of Physical Chemistry Letters, 2018, 9(3): 607-613.
96	LI Y X, SONG S B, KIM H, et al. A lithium superionic conductor for millimeter-thick battery electrode[J]. Science, 2023, 381(6653): 50-53.

Cathode					Lithium		Halide	Energy density
NCM811, 200 mAh/g; S₈,1400 mAh/g					Lithium		Halide	Energy density
ASSLB	CAM/%	Loading/(mg/cm²)	Capacity/(mAh/cm²)	Thickness/μm	Tap density/(g/cm³)	Thickness/μm	Thickness/μm	Wh/L	Wh/kg
Li	85	27	4	80	3.4	40	30	990	400
Li-S	60	10	8.4	70	1.4	80	30	650	500

[1]	Mingming SUN. Patent analysis of organic-inorganic composite solid-state electrolytes for lithium-ion batteries [J]. Energy Storage Science and Technology, 2024, 13(3): 1096-1105.
[2]	Huan LIU, Na PENG, Qingwen GAO, Wenpeng LI, Zhirong YANG, Jingtao WANG. Crown ether-doped polymer solid electrolyte for high-performance all-solid-state lithium batteries [J]. Energy Storage Science and Technology, 2023, 12(8): 2401-2411.
[3]	Lei LEI, Peng GAO, Nana FENG, Kunpeng CAI, Hai ZHANG, Yang ZHANG. The influences of multifactors in the synthesis progress on the characteristics of lithium lanthanum zirconate solid electrolytes [J]. Energy Storage Science and Technology, 2023, 12(5): 1625-1635.
[4]	LI Yitao, SHEN Kaier, PANG Quanquan. Advance in organics enhanced sulfide-based solid-state batteries [J]. Energy Storage Science and Technology, 2022, 11(6): 1902-1918.
[5]	Qingwen GAO, Zhihao YANG, Wenpeng LI, Wenjia WU, Jingtao WANG. Preparation and performance of Co²⁺-doped CeO₂-based laminar composite solid-state electrolyte [J]. Energy Storage Science and Technology, 2022, 11(12): 3776-3786.
[6]	Wenlin YAN, Fan WU, Hong LI, Liquan CHEN. Application of Si-based anodes in sulfide solid-state batteries [J]. Energy Storage Science and Technology, 2021, 10(3): 821-835.
[7]	Shangsen CHI, Yidong JIANG, Qingrong WANG, Ziwei YE, Kai YU, Jun MA, Jun JIN, Jun WANG, Chaoyang WANG, Zhaoyin WEN, Yonghong DENG. The liquid electrolyte modified interface between garnet-type solid-state electrolyte and lithium anode [J]. Energy Storage Science and Technology, 2021, 10(3): 914-924.
[8]	Xinxin ZHU, Wei JIANG, Zhengwei WAN, Shu ZHAO, Zeheng LI, Liguang WANG, Wenbin NI, Min LING, Chengdu LIANG. Research progress in electrolyte and interfacial issues of solid lithium sulfur batteries [J]. Energy Storage Science and Technology, 2021, 10(3): 848-862.
[9]	Yongsheng GAO, Guanghai CHEN, Xinran WANG, Ying BAI, Chuan WU. Safety of electrolytes for sodium-ion batteries: Strategies and progress [J]. Energy Storage Science and Technology, 2020, 9(5): 1309-1317.
[10]	ZHOU Hong, WEI Feng, WU Yongqing. Research on the development of inorganic solid-state electrolyte for lithium battery based on patent analysis [J]. Energy Storage Science and Technology, 2020, 9(3): 1001-1007.
[11]	YANG Jianfeng, LI Linyan, WU Zhenyue, WANG Kaixue. Progress of inorganic solid electrolyte for lithium ion batteries [J]. Energy Storage Science and Technology, 2019, 8(5): 829-837.
[12]	YANG Kaihua, LIAO Zhu, LI Xuesong, ZHANG Zhengxi, YANG Li. Novel ionic plastic crystal-polymeric ionic liquid all-solid-state electrolytes for lithium ion batteries [J]. Energy Storage Science and Technology, 2018, 7(6): 1113-1119.
[13]	LIU Lilu1, QI Xingguo1, SHAO Yuanjun1, PAN Du1,2, BAI Ying2, HU Yongsheng1, LI Hong1, CHEN Liquan1. Research progress on sodium ion solid-state electrolytes [J]. Energy Storage Science and Technology, 2017, 6(5): 961-980.
[14]	LIU Guanwei1,2, ZHANG Yichi1,2, CI Song1,2, YU Zhanqing1,2, ZENG Rong1,2. Research progress on flexible electrochemical energy storage devices [J]. Energy Storage Science and Technology, 2017, 6(1): 52-68.
[15]	XIE Qingshui, WANG Laisen, PENG Dongliang. Project “Basic research on high efficiency energy storage devices based on nanostructured materials” [J]. Energy Storage Science and Technology, 2017, 6(1): 162-164.