Metal–organic framework‐derived LiFePO4/C composites for lithium storage: In situ construction, effective exploitation, and targeted restoration
Yilin Li,
Ziqiang Fan,
Zhijian Peng,
Zhaohui Xu,
Xinyu Zhang,
Jian‐En Zhou,
Xiaoming Lin,
Zhenyu Wu,
Enyue Zhao,
Ronghua Zeng
Affiliations
Yilin Li
Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, School of Chemistry, South China Normal University Guangzhou People's Republic of China
Ziqiang Fan
Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, School of Chemistry, South China Normal University Guangzhou People's Republic of China
Zhijian Peng
Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, School of Chemistry, South China Normal University Guangzhou People's Republic of China
Zhaohui Xu
National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal University Nanchang People's Republic of China
Xinyu Zhang
Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, School of Chemistry, South China Normal University Guangzhou People's Republic of China
Jian‐En Zhou
Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, School of Chemistry, South China Normal University Guangzhou People's Republic of China
Xiaoming Lin
Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, School of Chemistry, South China Normal University Guangzhou People's Republic of China
Zhenyu Wu
Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, School of Chemistry, South China Normal University Guangzhou People's Republic of China
Enyue Zhao
Songshan Lake Materials Laboratory Dongguan People's Republic of China
Ronghua Zeng
Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, School of Chemistry, South China Normal University Guangzhou People's Republic of China
Abstract Hitherto, LiFePO4 (LFP) is bottlenecked by inferior electronic conductivity and sluggish Li+ diffusion, which can be resolved by cation doping, morphological engineering, carbon coating, and so forth. Among these methodologies, morphological optimization and carbon modification can warrant a stable operating voltage and prolong the cycling lifespan, which can be accessible by utilizing metal–organic frameworks as self‐sacrificing templates. Herein, we conceptualize a strategy to in‐situ construct N‐doped carbon‐coated LFP with Prussian blue analogues as the template, after which electrochemical tests extensively exploit the lithium storage capacity with 153.2 mAh g−1 after 500 cycles at 0.5 C. However, the capacity failure associated with the inevitable Li+ loss and destructed carbon layer provides sufficient room for the restoration of LFP after long‐term cycling. Motivated by this, the cell performance of LFP/C after targeted restoration using the 3,4‐dihydroxybenzonitrile dilithium salt is investigated, revealing a considerable recovered capacity due to the recuperative LFP crystal and uniform carbon layer with homogeneous N‐distribution. The computational study also supports the feasibility of N‐doped carbon layer in LFP modification. This study envisages a methodology for the performance improvement of LFP from directional fabrication to targeted recovery, providing insights into the manufacturing and reuse of LIB cathodes.