Few-Atomic-Layered Co-Doped BiOBr Nanosheet : Free-Standing Anode with Ultrahigh Mass Loading for “Rocking Chair” Zinc-Ion Battery

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Bei Long
  • Qing Zhang
  • Tengfei Duan
  • Ting Song
  • Yong Pei
  • Xianyou Wang
  • Xiongwei Wu
  • Qianyu Zhang
  • Yuping Wu

Detail(s)

Original languageEnglish
Article number2204087
Journal / PublicationAdvanced Science
Volume9
Issue number32
Online published13 Sept 2022
Publication statusPublished - 14 Nov 2022

Link(s)

Abstract

Insertion host materials are considered as a candidate to replace metallic Zn anode. However, the high mass loading anode with good electrochemical performances is reported rarely. Herein, a few-atomic-layered Co-doped BiOBr nanosheet (Co-UTBiOBr) is prepared via one-step hydrothermal method and a free-standing flexible electrode consisting of Co-UTBiOBr and CNTs is designed. Ultrathin nanosheet (3 atomic layers) and CNTs accelerate Zn2+ and electron transfer respectively. The Co-doping is conducive to the reduced Zn2+ diffusion barrier, the improved volume expansion after Zn2+ intercalation, and the enhanced electronic conductivity of BiOBr, verified by experimental and theoretical studies. An insertion-conversion mechanism is proposed according to ex situ characterizations. Benefiting from many advantages, Co-UTBiOBr displays a high capacity of 150 mAh g−1 at 0.1 A g−1 and a long-term cyclic life with ≈100% capacity attention over 3000 cycles at 1 A g−1. Remarkably, excellent electrochemical performances are maintained even at an ultrahigh mass loading of 15 mg cm−2. Co-UTBiOBr//MnO2 “rocking chair” zinc-ion battery exhibits a stable capacity of ≈130 mAh g−1 at 0.2 A g−1 during cyclic test and its flexible quasi-solid-state battery shows outstanding stability under various bending states. This work provides a new idea for designing high mass loading anode.

Research Area(s)

  • Co-doped BiOBr, few-atomic-layered nanosheets, insertion-conversion mechanism, long cyclic life, ultrahigh mass loading

Citation Format(s)

Few-Atomic-Layered Co-Doped BiOBr Nanosheet: Free-Standing Anode with Ultrahigh Mass Loading for “Rocking Chair” Zinc-Ion Battery. / Long, Bei; Zhang, Qing; Duan, Tengfei et al.
In: Advanced Science, Vol. 9, No. 32, 2204087, 14.11.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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