Citation: Shijie Liao, Dongming Cheng, Xinyan Xu, Qiyue Li, Shengzhe Xu, Jianchao Zhang, Helei Wei, Ying Wei, Qi Li, Kai Li, Zihan Long, Yuanyuan Luo, Yunhui Huang, Mingfeng Tan, Bo Lin, Henghui Xu. SO₃Li-grafted ion-conducting agents for graphite-based lithium-ion batteries with extended cycle life[J]. Chinese Chemical Letters, ;2026, 37(8): 111329. doi: 10.1016/j.cclet.2025.111329 shu

SO₃Li-grafted ion-conducting agents for graphite-based lithium-ion batteries with extended cycle life

Shijie Liao ^{a, 1} ,
Dongming Cheng ^{a, 1} ,
Xinyan Xu ^a ,
Qiyue Li ^a ,
Shengzhe Xu ^a ,
Jianchao Zhang ^a ,
Helei Wei ^b ,
Ying Wei ^a ,
Qi Li ^b ,
Kai Li ^a ,
Zihan Long ^a ,
Yuanyuan Luo ^a ,
Yunhui Huang ^a ,
Mingfeng Tan ^{b, *,} ,
Bo Lin ^{b, *,} ,
Henghui Xu ^{a, *,}

a.
School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
b.
Global R&D Center, Guangxi Liugong Metathings Technology Co., Ltd., Liuzhou 545007, China

tanmf@liugong.com

linbo@liugong.com

xuhh@hust.edu.cn

Received Date: 3 March 2025
Revised Date: 10 May 2025
Accepted Date: 15 May 2025
Available Online: 15 May 2025

Figures(6)

Graphite, the most widely used anode material in lithium-ion batteries, faces significant limitations due to sluggish lithium-ion diffusion across the conventional organic solid electrolyte interphase (SEI) during cycling. In this work, we propose the incorporation of SO₃Li-grafted graphene as an ion-conducting agent (ICA) to enhance lithium-ion transport kinetics within graphite anodes. The –SO₃Li functional groups regulate the Li⁺ solvation structure through anion-solvent dipole interactions, promoting the formation of a lithium fluoride (LiF)-rich SEI that ensures uniform lithium-ion flux and significantly extends battery cycle life. This SO₃Li-grafted ICA also mitigates mechanical strain within the graphite anode during repeated cycling, improving structural integrity over long-term operation, evidenced by fiber optic sensing technology. As a result, a 3 Ah GrLiFePO₄ pouch cell incorporating this functionalized ion-conducting agent achieves excellent cycling performance, retaining 86.4% of its capacity after 1200 cycles at 1 C. These findings demonstrate the effectiveness of functionalized ICAs in addressing the intrinsic limitations of graphite, providing a promising strategy for developing long-life lithium-ion batteries for practical energy storage applications.
- Lithium-ion batteries,
- Graphite anode,
- Ion-conducting agent,
- Lithium sulfonate groups (−SO₃Li),
- Solid electrolyte interphase,
- Long cycle life
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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

SO3Li-grafted ion-conducting agents for graphite-based lithium-ion batteries with extended cycle life

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通讯作者: 陈斌, bchen63@163.com

SO₃Li-grafted ion-conducting agents for graphite-based lithium-ion batteries with extended cycle life