Ni-doped Bi 2 O 2 CO 3 nanosheet with H + /Zn 2+ co-insertion for "rocking chair" zinc-ion battery
Developing insertion-type anode is key to advancing "rocking chair" zinc-ion batteries, though there are few reported insertion-type anodes. Herein, the Bi O CO is a high-potential anode, with a special layered structure. A one-step hydrothermal method was used to prepare Ni-doped Bi O CO...
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Published in | Journal of colloid and interface science Vol. 645; p. 483 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
01.09.2023
|
Online Access | Get full text |
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Summary: | Developing insertion-type anode is key to advancing "rocking chair" zinc-ion batteries, though there are few reported insertion-type anodes. Herein, the Bi
O
CO
is a high-potential anode, with a special layered structure. A one-step hydrothermal method was used to prepare Ni-doped Bi
O
CO
nanosheet, and also a free-standing electrode consisting of Ni-Bi
O
CO
and CNTs was designed. Both cross-linked CNTs conductive networks and Ni doping improve charge transfer. Ex situ tests (XRD, XPS, TEM, etc.) reveal the H
/Zn
co-insertion mechanism of Bi
O
CO
and that Ni doping improves its electrochemical reversibility and structural stability. Therefore, this optimized electrode offers a high specific capacity of 159 mAh g
at 100 mA g
, a suitable average discharge voltage of ≈0.400 V, and a long-term cycling stability of 2200 cycles at 700 mA g
. Besides, the Ni-Bi
O
CO
//MnO
"rocking chair" zinc-ion battery (based on the total mass of cathode and anode) delivers a high capacity of ≈100 mAh g
at 50.0 mA g
. This work provides a reference for designing high-performance anode in zinc-ion batteries. |
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ISSN: | 1095-7103 |