Analysis of the key materials employed in solid-state lithium batteries based on patent data mining

doi:10.19799/j.cnki.2095-4239.2024.0034

Abstract

Abstract:

The development of key materials for solid-state lithium batteries, which represent next-generation high-performance energy storage solutions, is essential for enhancing their energy density, stability, and safety. Considering global patents on solid-state lithium batteries as research objects, this study employs a text mining method to extract material information from these patents. Furthermore, by constructing the primary distribution and co-occurrence network of materials, it analyzes the characteristics of material distribution and identifies potential future materials of solid-state lithium batteries. In addition to the above network, a distribution and co-occurrence network of institutions and materials is also established to examine the material layouts and research considerations of major institutions. Specifically, new materials and research institutions appearing in the patents on solid-state lithium batteries since 2021 are reviewed, and current research hotspots and future development trends are identified. Notably, the review identifies lithium, aluminum, lanthanum, phosphorus, and sulfide as critical materials appearing in the solid-state lithium battery patents. Furthermore, the results reveal that most organizations focus on these core materials, adopting similar strategies for material development and application. Interestingly, a few important institutions also report the development of new materials for solid-state lithium batteries and acquire related patents, thus driving material development, technological innovation, and the commercialization of solid-state lithium batteries. Thus, this paper proposes a new method for analyzing and identifying materials used in solid-state lithium batteries, offering valuable insights for material development and technological innovations within this field.

Key words: solid state lithium battery, solid state electrolyte, patent analysis, key materials, material mining

CLC Number:

TM 912

Hong ZHOU, Zhulin XIN, Hao FU, Qiang ZHANG, Feng WEI. Analysis of the key materials employed in solid-state lithium batteries based on patent data mining[J]. Energy Storage Science and Technology, 2024, 13(7): 2386-2398.

Figures/Tables 8

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Table 1

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序号	材料中文名	材料英文名	频次	时间范围	2020年后专利占比
1	锂	lithium	2648	1998—2023	35.65%
2	硫化物	sulfide	767	2003—2023	34.29%
3	硫	sulfur	512	2003—2023	29.30%
4	磷	phosphorus	382	2003—2023	35.34%
5	铝	aluminum	318	2007—2023	44.97%
6	氧	oxygen	304	2003—2023	42.11%
7	碳	carbon	300	2001—2023	43.00%
8	硅	silicon	286	1999—2023	34.27%
9	氧化物	oxide	276	1999—2023	45.65%
10	锆	zirconium	241	2007—2023	40.66%
11	镧	lanthanum	208	2007—2023	39.90%
12	硫化锂	lithium sulfide	192	2001—2023	32.67%
13	钛	titanium	166	2008—2023	47.59%
14	镍	nickel	163	2008—2023	42.33%
15	氟	fluorine	141	2008—2023	61.70%
16	氯	chlorine	140	2010—2023	52.14%
17	溴	bromine	130	2010—2023	52.31%
18	镁	magnesium	130	2007—2023	42.31%
19	硼	boron	129	2003—2023	24.81%
20	碘	iodine	125	2010—2023	51.20%

排名	点度中心度		中介中心度		接近中心度		特征向量中心度
排名	材料	得分	材料	得分	材料	得分	材料	得分
1	锂	129	锂	6637.744	锂	0.006711	锂	0.250
2	铝	52	硫化物	282.189	铝	0.004405	铝	0.216
3	磷	47	铝	168.507	硫化物	0.004310	锆	0.203
4	硫化物	46	硫化锂	161.041	磷	0.004310	镁	0.201
5	硅	45	铌	157.523	硅	0.004274	硅	0.195
6	锆	45	磷	155.249	锆	0.004237	钛	0.195
7	镁	42	硅	136.948	硫	0.004184	磷	0.194
8	硫	40	硫	112.712	镁	0.004184	铌	0.192
9	钛	40	硫化磷	76.954	铌	0.004149	锡	0.185
10	铌	40	锆	74.872	钛	0.004149	锗	0.178

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