Uniform Na+ Doping‐Induced Defects in Li‐ and Mn‐Rich Cathodes for High‐Performance Lithium‐Ion Batteries

Wei He; Pengfei Liu; Baihua Qu; Zhiming Zheng; Hongfei Zheng; Pan Deng; Pei Li; Shengyang Li; Hui Huang; Laisen Wang; Qingshui Xie; Dong‐Liang Peng

doi:10.1002/advs.201802114

Advanced Science (Jul 2019)

Uniform Na+ Doping‐Induced Defects in Li‐ and Mn‐Rich Cathodes for High‐Performance Lithium‐Ion Batteries

Wei He,
Pengfei Liu,
Baihua Qu,
Zhiming Zheng,
Hongfei Zheng,
Pan Deng,
Pei Li,
Shengyang Li,
Hui Huang,
Laisen Wang,
Qingshui Xie,
Dong‐Liang Peng

Affiliations

Wei He: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Pengfei Liu: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Baihua Qu: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Zhiming Zheng: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Hongfei Zheng: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Pan Deng: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Pei Li: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Shengyang Li: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Hui Huang: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Laisen Wang: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Qingshui Xie: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China
Dong‐Liang Peng: Department of Materials Science and Engineering State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Materials and Pen‐Tung Sah Institute of Micro‐Nano Science and Technology Xiamen University Xiamen 361005 P. R. China

DOI: https://doi.org/10.1002/advs.201802114
Journal volume & issue: Vol. 6, no. 14
pp. n/a – n/a

Abstract

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Abstract The corrosion of Li‐ and Mn‐rich (LMR) electrode materials occurring at the solid–liquid interface will lead to extra electrolyte consumption and transition metal ions dissolution, causing rapid voltage decay, capacity fading, and detrimental structure transformation. Herein, a novel strategy is introduced to suppress this corrosion by designing an Na+‐doped LMR (Li1.2Ni0.13Co0.13Mn0.54O2) with abundant stacking faults, using sodium dodecyl sulfate as surfactant to ensure the uniform distribution of Na+ in deep grain lattices—not just surface‐gathering or partially coated. The defective structure and deep distribution of Na+ are verified by Raman spectrum and high‐resolution transmission electron microscopy of the as‐prepared electrodes before and after 200 cycles. As a result, the modified LMR material shows a high reversible discharge specific capacity of 221.5 mAh g−1 at 0.5C rate (1C = 200 mA g−1) after 200 cycles, and the capacity retention is as high as 93.1% which is better than that of pristine‐LMR (64.8%). This design of Na+ is uniformly doped and the resultanting induced defective structure provides an effective strategy to enhance electrochemical performance which should be extended to prepare other advanced cathodes for high performance lithium‐ion batteries.

Published in Advanced Science

ISSN: 2198-3844 (Online)
Publisher: Wiley
Country of publisher: Germany
LCC subjects: Science
Website: https://onlinelibrary.wiley.com/journal/21983844

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