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 Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | 2204087 |
Journal / Publication | Advanced Science |
Volume | 9 |
Issue number | 32 |
Online published | 13 Sept 2022 |
Publication status | Published - 14 Nov 2022 |
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DOI | DOI |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85137929032&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(7ce09756-9f05-4c5f-88bb-5e79896a6e88).html |
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.
In: Advanced Science, Vol. 9, No. 32, 2204087, 14.11.2022.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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