Reduction of external pressure on all‐solid‐state battery using SnO 2 ‐embedded porous carbon by CNT assistance
Reduction of external pressure on all‐solid‐state battery using SnO 2 ‐embedded porous carbon by CNT assistance
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通过CNT辅助降低使用SnO 2 嵌入多孔碳的全固态电池的外部压力
DOI：
10.1002/nano.202100042
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Moriguchi Isamu
中科院分区：
文献类型：
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作者：
Notohara Hiroo;Urita Koki;Moriguchi Isamu
使用不可燃无机固体电解质的全固态电池（ASSB）有望成为一种具有高能量密度的安全储能系统。由于需要外部压力来维持活性材料和固体电解质之间的稳定界面，压力施加系统使得电池模块变得更大、更重，并且阻碍了实际实现。在本研究中，ASSB 系统通过使用单壁碳纳米管 (SWCNT) 辅助来降低外部压力。与SWCNT混合的ASSB电极即使在没有额外外部压力的硬币型电池下也表现出高容量和稳定的循环性能，而传统上用于有机液体电解质系统。 SWCNT的高导电性和自支撑力的独特特性可有效降低ASSB的外部压力。这一结果开辟了设计小型电池的新途径。
All‐solid‐state batteries (ASSBs) using non‐flammable inorganic solid electrolyte are expected as a safety energy storage system that exhibits a high energy density. Since external pressure is required to maintain stable interface between active materials and solid electrolyte, the pressure applicable system make the cell modules larger and heavier, and it prevents the practical realization. In the present study, an ASSB system reduced external pressure was achieved by using single‐walled carbon nanotube (SWCNT) assistance. The ASSB electrode mixed with SWCNTs showed high capacity and stable cycle performance even under a coin‐type cell without additional external pressure which is conventionally used on an organic liquid electrolyte system. The unique characters of SWCNT which is high electrical conductivity and self‐supporting force are effective to reduce external pressure of ASSBs. This result opens a new route to design a downsized battery cell.