Citation: Chong Tang, Zhong Qiu, Chen Li, Tengfei Zhang, Renhong Chen, Yifa Sheng, Xinhui Xia, Yongqi Zhang, Jun Liu. Rational synthesis of vertical graphene supported TiN@N-Li₄Ti₅O₁₂ as advanced high-rate electrodes for lithium-ion batteries[J]. Chinese Chemical Letters, ;2025, 36(11): 110589. doi: 10.1016/j.cclet.2024.110589 shu

Rational synthesis of vertical graphene supported TiN@N-Li₄Ti₅O₁₂ as advanced high-rate electrodes for lithium-ion batteries

Chong Tang ^a ,
Zhong Qiu ^b ,
Chen Li ^b ,
Tengfei Zhang ^b ,
Renhong Chen ^a ,
Yifa Sheng ^a ,
Xinhui Xia ^{c, *,} ,
Yongqi Zhang ^{b, *,} ,
Jun Liu ^{a, *,}

a.
Engineering and Research Center for Integrated New Energy Photovoltaics and Energy Storage Systems of Hunan Province, School of Electrical Engineering, University of South China, Hengyang 421001, China
b.
Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu 611371, China
c.
College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China

helloxxh@zju.edu.cn

yqzhang@uestc.edu.cn

2021000103@usc.edu.cn

Received Date: 26 September 2024
Revised Date: 15 October 2024
Accepted Date: 29 October 2024
Available Online: 30 October 2024

Figures(5)

The Li₄Ti₅O₁₂ (LTO) is demonstrated to be one of the most promising anode materials for lithium-ion batteries (LIBs) to provide safe and high-power density cells but suffer from poor electrical conductivity. In this study, we present a TiN-decorated N-LTO on a vertical graphene (VG) array (TiN@N-LTO) as a potential anode material for lithium-ion batteries (LIBs). The use of atomic layer deposition (ALD) enables the formation of a thin layer of LTO on VG, with precise control over the thickness. The VG serves as highly conductive channels, facilitating the transfer of electrons. Moreover, the introduction of nitrogen heteroatoms into the LTO under an active N₂ plasma atmosphere has been shown to enhance its intrinsic conductivity, which is achieved by reducing the bandgap and expanding the diffusion pathways of ions. Concurrently, a small number of metallic TiN are formed and deposited on the surface of N-LTO, thereby further improving its conductivity. COMSOL simulations and DFT calculations demonstrate that the introduced TiN acts as a "conductive bridge", improving the charge distribution of LTO electrodes and enhancing the Li⁺ transport rate. The TiN@N-LTO exhibits a high rate performance (169.51, 131.61 and 101.08 mAh/g at 0.2, 2 and 20 C, respectively) and remarkable cycling stability (a capacity retention of 99.6% after 5000 cycles at 10 C).
- Lithium-ion batteries,
- Li₄Ti₅O₁₂,
- Nitrogen doping,
- TiN,
- Plasma
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Rational synthesis of vertical graphene supported TiN@N-Li4Ti5O12 as advanced high-rate electrodes for lithium-ion batteries

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通讯作者: 陈斌, bchen63@163.com

Rational synthesis of vertical graphene supported TiN@N-Li₄Ti₅O₁₂ as advanced high-rate electrodes for lithium-ion batteries