ETRI-Knowledge Sharing Plaform



논문 검색
구분 SCI
연도 ~ 키워드


학술지 Electrolyte-free Graphite Electrode with Enhanced Interfacial Conduction Using Li+-conductive Binder for High-performance All-solid-state Batteries
Cited 10 time in scopus Download 2164 time Share share facebook twitter linkedin kakaostory
신동옥, 김형준, 정승원, 변승우, 최재철, 김민평, 김주영, 강석훈, 박영삼, 홍성유, 조맹효, 이영기, 조경재, 이용민
Energy Storage Materials, v.49, pp.481-492
22ZB1200, ICT 소재·부품·장비 자립기술 및 도전기술 개발, 황치선
Electrodes supported by conductive binders are expected to outperform ones with inert binders that potentially disturb electronic/ionic contacts at interfaces. Unlike electron-conductive binders, the employment of Li+-conductive binders has attracted relatively little attention due to the liquid electrolyte (LE)-impregnated electrode configuration in the conventional lithium-ion batteries (LIBs). Herein, an all-solid-state electrolyte-free electrode where electrolyte components are completely excluded is introduced as a new tactical electrode construction to evaluate the effectiveness of the Li+-conductive binder on enhancing the interfacial conduction, ultimately leading to high-performance all-solid-state batteries (ASSBs). Conductive lithium carboxymethyl cellulose (Li-CMC) is prepared through an optimized two-step cation-exchange reaction without physical degradation. The electrolyte-free graphite electrode employing Li-CMC as the binder shows strikingly improved areal and volumetric capacity of 1.46 mAh cm?닋2 and 490 mAh cm?닋3 at a high current rate (1.91 mA cm?닋2) and 60 °C which are far superior to those (1.07 mAh cm?닋2 and 356.7 mAh cm?닋3) using Na-CMC. Moreover, systematic monitoring of the lithiation dynamics inside the electrolyte-free electrode clarifies that the interfacial Li+ conduction is greatly promoted in the Li-CMC electrode. Complementary analysis from in-depth electrochemical measurements and multiscale simulations verifies that serious internal resistance from impeded interparticle diffusion by inert binders can be substantially mitigated using Li-CMC.
KSP 제안 키워드
Carboxymethyl cellulose, Current rate, Electrochemical measurements, High current, High performance, Interfacial conduction, Internal resistance, Interparticle diffusion, Ion batteries, Liquid electrolyte, Multiscale simulations
본 저작물은 크리에이티브 커먼즈 저작자 표시 - 비영리 - 변경금지 (CC BY NC ND) 조건에 따라 이용할 수 있습니다.
저작자 표시 - 비영리 - 변경금지 (CC BY NC ND)