Citric acid-modified silicon anode with dual carbon stress modulation for stable lithium storage

doi:10.1016/j.cjche.2025.06.012

中国化学工程学报 ›› 2025, Vol. 87 ›› Issue (11): 229-238.DOI: 10.1016/j.cjche.2025.06.012

Citric acid-modified silicon anode with dual carbon stress modulation for stable lithium storage

Qianqian Fan¹, Jing Wang¹, Zhiyuan Gao¹, Zhenpeng Zhu¹, Xingmei Guo¹, Yuanjun Liu¹, Xiangjun Zheng¹, Zhongyao Duan¹, Qinghong Kong², Junhao Zhang¹

1. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
2. School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China

收稿日期:2025-02-09 修回日期:2025-05-13 接受日期:2025-06-09 出版日期:2025-11-28 发布日期:2025-07-22
通讯作者: Junhao Zhang,E-mail:jhzhang6@just.edu.cn
基金资助:
The work was financially supported by Industry foresight and common key technology research in Carbon Peak and Carbon Neutrality Special Project from Zhenjiang city (CG2023003), National Natural Science Foundation of China (22379056, 22409076).

Citric acid-modified silicon anode with dual carbon stress modulation for stable lithium storage

Qianqian Fan¹, Jing Wang¹, Zhiyuan Gao¹, Zhenpeng Zhu¹, Xingmei Guo¹, Yuanjun Liu¹, Xiangjun Zheng¹, Zhongyao Duan¹, Qinghong Kong², Junhao Zhang¹

1. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
2. School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China

Received:2025-02-09 Revised:2025-05-13 Accepted:2025-06-09 Online:2025-11-28 Published:2025-07-22
Contact: Junhao Zhang,E-mail:jhzhang6@just.edu.cn
Supported by:
The work was financially supported by Industry foresight and common key technology research in Carbon Peak and Carbon Neutrality Special Project from Zhenjiang city (CG2023003), National Natural Science Foundation of China (22379056, 22409076).

摘要/Abstract

摘要： To effectively enhanced structural stability and cycling performance, a dual carbon protection strategy is proposed to fabricate Si nanoparticles encapsulated in citric acid (CA)-derived inner carbon layer and zeolitic imidazolate framework-67 (ZIF-67) derived outer carbon layer (Si@C-CA@c-ZIF). The results reveal that citric acid-derived carbon facilitates a uniform ZIF-67 coating on the Si surface and serves as the inner carbon precursor to reduce volumetric expansion of Si particles, more importantly, it can enhance the transport of electrons and ions between Si particles and ZIF-67-derived carbon. The ZIF-67-derived outer carbon layer further restricts Si particle expansion and enhances conductivity. Evaluated as anode material for lithium ion batteries, the Si@C-CA@c-ZIF anode demonstrates outstanding lithium storage performance, the high specific capacity is high to 924 mA·h·g^-1 at 1.0 A·g^-1 after 10 cycles of activation, and it still maintains a reversible capacity of 703.3 mA·h·g^-1 after 1000 cycles, along with a capacity retention of 76.1%. This work highlights the effectiveness of the dual carbon framework in addressing the volume expansion and conductivity limitations of Si, with potential applications for other high-capacity anode materials.

关键词: Dual carbon stress modulation, Citric acid, Silicon anodes, Electrochemistry, Volume expansion, Kinetics

Abstract: To effectively enhanced structural stability and cycling performance, a dual carbon protection strategy is proposed to fabricate Si nanoparticles encapsulated in citric acid (CA)-derived inner carbon layer and zeolitic imidazolate framework-67 (ZIF-67) derived outer carbon layer (Si@C-CA@c-ZIF). The results reveal that citric acid-derived carbon facilitates a uniform ZIF-67 coating on the Si surface and serves as the inner carbon precursor to reduce volumetric expansion of Si particles, more importantly, it can enhance the transport of electrons and ions between Si particles and ZIF-67-derived carbon. The ZIF-67-derived outer carbon layer further restricts Si particle expansion and enhances conductivity. Evaluated as anode material for lithium ion batteries, the Si@C-CA@c-ZIF anode demonstrates outstanding lithium storage performance, the high specific capacity is high to 924 mA·h·g^-1 at 1.0 A·g^-1 after 10 cycles of activation, and it still maintains a reversible capacity of 703.3 mA·h·g^-1 after 1000 cycles, along with a capacity retention of 76.1%. This work highlights the effectiveness of the dual carbon framework in addressing the volume expansion and conductivity limitations of Si, with potential applications for other high-capacity anode materials.

Key words: Dual carbon stress modulation, Citric acid, Silicon anodes, Electrochemistry, Volume expansion, Kinetics

Qianqian Fan, Jing Wang, Zhiyuan Gao, Zhenpeng Zhu, Xingmei Guo, Yuanjun Liu, Xiangjun Zheng, Zhongyao Duan, Qinghong Kong, Junhao Zhang. Citric acid-modified silicon anode with dual carbon stress modulation for stable lithium storage[J]. 中国化学工程学报, 2025, 87(11): 229-238.

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Citric acid-modified silicon anode with dual carbon stress modulation for stable lithium storage

Citric acid-modified silicon anode with dual carbon stress modulation for stable lithium storage

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