Research on the development of inorganic solid-state electrolyte for lithium battery based on patent analysis

doi:10.19799/j.cnki.2095-4239.2019.0244

Abstract

Abstract:

Commercial lithium-ion batteries mostly use liquid electrolytes as electrolyte systems, which have problems such as insufficient electrochemical stability, low thermal stability and poor safety. The inorganic solid-state electrolyte has been a research hotspot in the current energy storage field because of its advantages of high electrochemical stability, high mechanical strength and so on. In this paper, the global patents in the field of inorganic solid-state electrolyte are taken as the research objects. By using patent data mining method, the technical layout, competitive advantage and core technology of the main institutions, and the development trend of the latest technology of sulfide electrolyte and oxide electrolyte are analyzed. Finally, suggestions were put forward to pay attention to the major needs of the country, accelerate the research and development of key technologies, and attach importance to the patent protection strategy.

Key words: inorganic solid-state electrolyte, sulfide electrolyte, oxide electrolyte, patent analysis

CLC Number:

TM 912

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.

Figures/Tables 5

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Table 1

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References 27

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类型	材料	导电率/S·cm^-1	优点	缺点	主要研发机构（括号内数字为相关专利数量）
氧化物电解质	钙钛矿型	10^-5~～10^-3	高化学和电化学稳定性；高机械强度；高电化学氧化电压	不灵活；大规模生产成本高	NGK公司（14）；比亚迪公司（6）；精工爱普生公司（6）；溧阳天目先导电池材料科技有限公司（6）
	石榴石型				NGK 公司（31），丰田汽车公司（23），QuantumScape公司（23），三星电子公司（13），村田制作所（8），精工爱普生公司（8）
	NASICON型				村田制作所（17）；丰田汽车（9）；NGK公司（7）
	LISICON型				溧阳天目先导电池材料科技有限公司（5）；出光兴产公司（3）；LG化学公司（3）
	LiPON薄膜	10^-6	循环寿命长；阴极材料稳定	大规模生产成本高	富士胶片公司（7）；Sakti3公司（4）
硫化物电解质	二元硫化物Li₂S-P₂S₅等；三元硫化物Li₂S-P₂S₅-MS _x 等	10^-7~～10^-3	高导电率；良好的机械强度和机械柔韧性；较低的晶界电阻	低氧化稳定性；对湿气敏感；与阴极材料的相容性差	丰田汽车公司（262）；出光兴产公司（147）；住友电工公司（64）；三星电子公司（60）；LG化学公司（46）；富士胶片公司（43）；Nanoteck公司（34）；松下公司（31）

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