Advanced Science (Jul 2022)
Enabling Long Cycle Life and High Rate Iron Difluoride Based Lithium Batteries by In Situ Cathode Surface Modification
- Yong Su,
- Jingzhao Chen,
- Hui Li,
- Haiming Sun,
- Tingting Yang,
- Qiunan Liu,
- Satoshi Ichikawa,
- Xuedong Zhang,
- Dingding Zhu,
- Jun Zhao,
- Lin Geng,
- Baiyu Guo,
- Congcong Du,
- Qiushi Dai,
- Zaifa Wang,
- Xiaomei Li,
- Hongjun Ye,
- Yunna Guo,
- Yanshuai Li,
- Jingming Yao,
- Jitong Yan,
- Yang Luo,
- Hailong Qiu,
- Yongfu Tang,
- Liqiang Zhang,
- Qiao Huang,
- Jianyu Huang
Affiliations
- Yong Su
- School of Materials Science and Engineering Xiangtan University Xiangtan Hunan 411105 P. R. China
- Jingzhao Chen
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Hui Li
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Haiming Sun
- Research Center for Ultra‐High Voltage Electron Microscopy Osaka University Ibaraki Osaka 567‐0047 Japan
- Tingting Yang
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Qiunan Liu
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Satoshi Ichikawa
- Research Center for Ultra‐High Voltage Electron Microscopy Osaka University Ibaraki Osaka 567‐0047 Japan
- Xuedong Zhang
- School of Materials Science and Engineering Xiangtan University Xiangtan Hunan 411105 P. R. China
- Dingding Zhu
- School of Materials Science and Engineering Xiangtan University Xiangtan Hunan 411105 P. R. China
- Jun Zhao
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Lin Geng
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Baiyu Guo
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Congcong Du
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Qiushi Dai
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Zaifa Wang
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Xiaomei Li
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Hongjun Ye
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Yunna Guo
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Yanshuai Li
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Jingming Yao
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Jitong Yan
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Yang Luo
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Hailong Qiu
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Yongfu Tang
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Liqiang Zhang
- Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
- Qiao Huang
- School of Materials Science and Engineering Xiangtan University Xiangtan Hunan 411105 P. R. China
- Jianyu Huang
- School of Materials Science and Engineering Xiangtan University Xiangtan Hunan 411105 P. R. China
- DOI
- https://doi.org/10.1002/advs.202201419
- Journal volume & issue
-
Vol. 9,
no. 21
pp. n/a – n/a
Abstract
Abstract Metals fluorides (MFs) are potential conversion cathodes to replace commercial intercalation cathodes. However, the application of MFs is impeded by their poor electronic/ionic conductivity and severe decomposition of electrolyte. Here, a composite cathode of FeF2 and polymer‐derived carbon (FeF2@PDC) with excellent cycling performance is reported. The composite cathode is composed of nanorod‐shaped FeF2 embedded in PDC matrix with excellent mechanical strength and electronic/ionic conductivity. The FeF2@PDC enables a reversible capacity of 500 mAh g–1 with a record long cycle lifetime of 1900 cycles. Remarkably, the FeF2@PDC can be cycled at a record rate of 60 C with a reversible capacity of 107 mAh g–1 after 500 cycles. Advanced electron microscopy reveals that the in situ formation of stable Fe3O4 layers on the surface of FeF2 prevents the electrolyte decomposition and leaching of iron (Fe), thus enhancing the cyclability. The results provide a new understanding to FeF2 electrochemistry, and a strategy to radically improve the electrochemical performance of FeF2 cathode for lithium‐ion battery applications.
Keywords
- conversion cathodes
- electrolyte decomposition
- lithium‐ion batteries
- long cycle lifetime
- stable Fe3O4 layers
