摘要
Li/garnet/LiFePO_(4) solid-state battery was fabricated.The cathode contains LiFePO_(4),Ketjen black,poly(vinylidene fluoride):LiTFSI polymer as active material,electric conductor and Li-ion conducting binder,respectively.Polyvinylpyrrolidone was added into the cathode to improve cathode/electrolyte interfacial performance.When combined with polyvinylpyrrolidone additive,poly(vinylidene fluoride):polyvinylpyrrol idone:LiTFSI blend forms,and the cathode/electrolyte interfacial resistance reduces from 10.7 kΩto 3.2 kΩ.The Li/garnet/LiFePO_(4) solid-state battery shows 80%capacity retention after 100 cycles at 30℃and 0.05 C.This study offers a general strategy to improve cathode/electrolyte interfacial performance and may enable the practical application of solid-state Li-metal batteries.
作者
孙继杨
李忆秋
郭向欣
SUN Jiyang;LI Yiqiu;GUO Xiangxin(State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;University of Chinese Academy of Sciences,Beijing 100039,China;College of Physics,Qingdao University,Qingdao 266071,China)
基金
Funded by the National Natural Science Foundation of China(Nos.51772314,51532002,51771222 and 51702346)
the Natural Science Foundation of Shanghai City(17ZR1434600)。
