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Luo X, Huang Q, Feng Y, Zhang C, Liang C, Zhou L, Wei W. Constructing a Composite Structure by a Gradient Mg 2+ Doping Strategy for High-Performance Sodium-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2022; 14:51846-51854. [PMID: 36346960 DOI: 10.1021/acsami.2c13354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Layered P2-Na0.67Mn0.67Ni0.33O2 has been considered an attractive cathode material for sodium-ion batteries (SIBs). Nevertheless, it is still burdened with hazardous phase transformation of P2-O2 under high voltage and harmful reactions at the interface of the electrode and electrolyte. These result in unfavorable structural degradation and rapid capacity decay. Herein, a gradient Mg2+ doping approach is proposed to trigger a structural transformation. During the annealing process, the bulk-diffused Mg2+ and surface residual Mg2+ induce the formation of the P2/P3@MgO structure. Consequently, this method combines the merits of the composite phases, bulk doping, and surface modification. In consequence, Na+ diffusion kinetics and electrochemical performances are remarkably enhanced. The cells using P2/P3@MgO show 69.7% capacity retention at 0.2 C within a voltage range of 1.5-4.5 V for 100 cycles, compared with the 42.6% for P2-Na0.67Mn0.67Ni0.33O2. This work offers new insights into further developments of advanced layered oxide cathodes for SIBs.
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Affiliation(s)
- Xin Luo
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, People's Republic of China
| | - Qun Huang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, People's Republic of China
| | - Yiming Feng
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, People's Republic of China
| | - Chunxiao Zhang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, People's Republic of China
| | - Chaoping Liang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, People's Republic of China
| | - Liangjun Zhou
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, People's Republic of China
| | - Weifeng Wei
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, People's Republic of China
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Zhang D, Pei K, Peng Z, Wang H, Wang Q, Sun H, Hu Z, Li Z, Wang B. Unravelling the Influence of Synthetic Paths on the Cation Arrangement in Lithium-rich Layered Oxide Cathode Materials. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Luo D, Xie H, Tan F, Ding X, Cui J, Xie X, Liu C, Lin Z. Scalable Nitrate Treatment for Constructing Integrated Surface Structures to Mitigate Capacity Fading and Voltage Decay of Li-Rich Layered Oxides. Angew Chem Int Ed Engl 2022; 61:e202203698. [PMID: 35441768 DOI: 10.1002/anie.202203698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Indexed: 11/05/2022]
Abstract
Capacity fading and voltage decay is one of the biggest obstacles for the practical application of Li-rich layered oxides due to the serious surface-related detrimental reactions. Herein, we develop a versatile and scalable method to construct a robust surface-integrated structure. All the designed samples deliver outstanding capacity and voltage stability, among which the Zn-treated sample possesses the best electrochemical performance. Its capacity retention is larger than 90 % after 400 cycles with a voltage decay ratio as small as 0.73 mV per cycle. What is more, the rules of surface-integrated structure with different cations in terms of capacity and voltage stability is further deciphered by combining with density function theory (DFT) calculations. It is found that to obtain advanced Li-rich layered oxide cathodes, cations in Li-sites should firstly ensure the binding energy of the surface-integrated structure in a lower level and then provide Bader charge for the nearest O atoms as small as possible.
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Affiliation(s)
- Dong Luo
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Huixian Xie
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Fulin Tan
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Xiaokai Ding
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Jiaxiang Cui
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Xiaoyan Xie
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Chenyu Liu
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Zhan Lin
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
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Luo D, Xie H, Tan F, Ding X, Cui J, Xie X, Liu C, Lin Z. Scalable Nitrate Treatment for Constructing Integrated Surface Structures to Mitigate Capacity Fading and Voltage Decay of Li‐Rich Layered Oxides. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dong Luo
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 China
| | - Huixian Xie
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 China
| | - Fulin Tan
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 China
| | - Xiaokai Ding
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 China
| | - Jiaxiang Cui
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 China
| | - Xiaoyan Xie
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 China
| | - Chenyu Liu
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 China
| | - Zhan Lin
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 China
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