Constructing high-toughness polyimide binder with robust polarity and ion-conductive mechanisms ensuring long-term operational stability of silicon-based anodes

Kang, Yongjun; Dong, Nanxi; Liu, Fangzhou; Lin, Daolei; Liu, Bingxue; Tian, Guofeng; Qi, Shengli; Wu, Dezhen

doi:10.1016/j.jechem.2024.02.031

Journal of Energy Chemistry

2024

DOI: 10.1016/j.jechem.2024.02.031

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Constructing high-toughness polyimide binder with robust polarity and ion-conductive mechanisms ensuring long-term operational stability of silicon-based anodes

Yongjun Kang,

Nanxi Dong,

Fangzhou Liu

et al.

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Cited by 4 publications

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Volumetric Stress Managements on Silicon Anode of Lithium‐Ion Batteries by a Self‐Adaptable Binder

Wu,

He,

et al. 2024

Energy & Environ Materials

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The intrinsic volume changes (about 300%) of Si anode during the lithiation/delithiation leads to the serious degradation of battery performance despite of theoretical capacity of 3579 mAh g−1 of Si. Herein, a three‐dimensional (3D) conductive polymer binder with adjustable crosslinking density has been designed by employing citric acid (CA) as a crosslinker between the carboxymethyl cellulose (CMC) and the poly(3,4‐ethylenedioxythiophene) poly‐(styrene‐4‐sulfonate) (PEDOT:PSS) to stabilize Si anode. By adjusting the crosslinking density, the binder can achieve a balance between rigidity and flexibility to adapt the volume expansion upon lithiation and reversible volume recovery after delithiation of Si. Therefore, Si/CMC‐CA‐PEDOT:PSS (Si/CCP) electrode demonstrates an excellent performance with high capacities of 2792.3 mAh g−1 at 0.5 A g−1 and a high area capacity above 2.6 mAh cm−2 under Si loading of 1.38 mg cm−2. The full cell Si/CCP paired with Li(Ni0.8Co0.1Mn0.1)O2 cathode discharges a capacity of 199.0 mAh g−1 with 84.3% ICE at 0.1 C and the capacity retention of 95.6% after 100 cycles. This work validates the effectiveness of 3D polymer binder and provides new insights to boost the performance of Si anode.

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Volumetric Stress Managements on Silicon Anode of Lithium‐Ion Batteries by a Self‐Adaptable Binder

Wu,

He,

et al. 2024

Energy & Environ Materials

View full text Add to dashboard Cite

show abstract

Advanced binder design for high-performance silicon anodes

Yang,

Meng,

Zheng

et al. 2024

Energy Storage Materials

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Mitigating volume expansion of silicon-based anode through interfacial engineering based on intermittent discharge strategy

Li,

Zhu,

Quan

et al. 2024

Journal of Energy Chemistry

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Constructing high-toughness polyimide binder with robust polarity and ion-conductive mechanisms ensuring long-term operational stability of silicon-based anodes

Cited by 4 publications

References 46 publications

Volumetric Stress Managements on Silicon Anode of Lithium‐Ion Batteries by a Self‐Adaptable Binder

Volumetric Stress Managements on Silicon Anode of Lithium‐Ion Batteries by a Self‐Adaptable Binder

Advanced binder design for high-performance silicon anodes

Mitigating volume expansion of silicon-based anode through interfacial engineering based on intermittent discharge strategy

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