A Coral‐Like FeP@NC Anode with Increasing Cycle Capacity for Sodium‐Ion and Lithium‐Ion Batteries Induced by Particle Refinement. Issue 47 (18th October 2021)

• Record Type: Journal Article
• Authors: Wang, Canpei; Yan, Jitong; Li, Tianyu; Lv, Zhiqiang; Hou, Xin; Tang, Yongfu; Zhang, Huamin; Zheng, Qiong; Li, Xianfeng
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 47(2021)
• Page Start: 25013
• Page End: 25019
• Publication Date: 2021-10-18
• Subjects: batteries -- cycling -- capacity increment -- FeP@NC -- particle refining -- transmission electron microscopy; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202110177
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: We present a coral‐like FeP composite with FeP nanoparticles anchored and dispersed on a nitrogen‐doped 3D carbon framework (FeP@NC). Due to the highly continuous N‐doped carbon framework and a spring‐buffering graphitized carbon layer around the FeP nanoparticle, a sodium‐ion battery with the FeP@NC composite exhibits an ultra‐stable cycling performance at 10 A g −1 with a capacity retention of 82.0 % in 10 000 cycles. Also, particle refinement leads to a capacity increase during cycling. The FeP nanoparticles go through a refining–recombination process during the first cycle and present a global refining trend after dozens of cycles, which results in a gradually increase in graphitization degree and interface magnetization, and further provides more active sites for Na + storage and contributes to a rising capacity with cycling. The capacity ascending phenomenon can also extend to lithium‐ion batteries. Abstract : Refinement of FeP nanoparticles can result in a gradual increase in the graphitization degree and interface magnetization. Furthermore, it provides more active sites for Na + storage and contributes to a rising capacity during cycling.