BiOI Nanopaper As a High-Capacity, Long-Life and Insertion-Type Anode for a Flexible Quasi-Solid-State Zn-Ion Battery

作者：Zhang, Qing; Duan, Tengfei; Xiao, Manjun; Pei, Yong; Wang, Xianyou; Zhi, Chunyi; Wu, Xiongwei^*; Long, Bei^*; Wu, Yuping

来源：ACS applied materials & interfaces, 2022, 14(22): 25516-25523.

DOI：10.1021/acsami.2c04946

• BiOI nanopaper
• intercalation-type anode
• Mn(3)O(4 )cathode
• long cyclic life
• flexible quasi-solid-state battery

The development of intercalation anodes with high capacity is key to promote the progress of "rocking-chair" Zn-ion batteries (ZIBs). Here, layered BiOI is considered as a promising electrode in ZIBs due to its large interlayer distance (0.976 nm) and low Zn2+ diffusion barrier (0.57 eV) obtained by density functional theory, and a free-standing BiOI nanopaper is designed. The process and mechanism of Zn(H2O)(n)(2+) insertion in BiOI are proved by ex situ X-ray diffraction, Raman, and X-ray photoelectron spectroscopy. The suitable potential (0.6 V vs Zn/Zn2+), high reversible capacity (253 mAh g(-1)), good rate performance (171 mAh g(-1) at 10 A long cyclic life (113 mAh g(-1) after 5000 cycles at 5 A g(-1)), and dendrite-free operation of BiOI nanopaper prove its potential as a superior anode. When it is coupled with Mn3O4 cathode, the quasi-solid-state battery exhibits a high initial capacity of 149 mAh g(-4) (for anode) and a good capacity retention of 70 mAh g(-1) after 400 cycles. The self-assembled flexible battery also shows stable charge-discharge during the cyclic test. This work shows the feasibility of BiOX anode for dendrite-free ZIBs.

• 单位
  湘潭大学