Co, Ni-Free Ultrathick Free-Standing Dry Electrodes for Sustainable Lithium-Ion Batteries,ACS Applied Energy Materials

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Co, Ni-Free Ultrathick Free-Standing Dry Electrodes for Sustainable Lithium-Ion Batteries
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2023-12-08 , DOI: 10.1021/acsaem.3c02448
Milan K. Sadan _{1,

2} , Guo J. Lian ₁ , Rachel M. Smith _{1,

2} , Denis Cumming _{1,

2}

Affiliation

The conventional method of manufacturing lithium-ion battery electrodes employs a complex slurry casting process with solvents that are not environmentally friendly and process parameters that are often difficult to control. This study explores a solvent-free dry electrode fabrication process of Co- and Ni-free LiMn₂O₄ (LMO) cathodes using a fibrillated polymer, polytetrafluoroethylene (PTFE). A thick, dry electrode (265–368 μm, 30–64 mg cm^–2) of LMO cathode was prepared successfully for the first time. Altering the conductive additives in the LMO dry electrode revealed multiwalled carbon nanotubes (CNTs) as the best conducting agent for dry electrode formulation in terms of conductivity and rate performance. Additionally, an all-dry electrode full cell consisting of both a dry electrode cathode (LMO) and an anode (LTO) delivered a stable cycling performance with a capacity retention of 82.8% after 200 cycles, demonstrating the scope for all-dry electrode full cells for future applications.

中文翻译：

用于可持续锂离子电池的无钴超厚独立式干电极

制造锂离子电池电极的传统方法采用复杂的浆料铸造工艺，所用溶剂不环保，工艺参数通常难以控制。本研究探索了使用原纤化聚合物聚四氟乙烯 (PTFE) 的无钴和无镍 LiMn ₂ O _{4 (LMO) 阴极的无溶剂干电极制造工艺。}首次成功制备了LMO正极的厚干电极（265–368 μm，30–64 mg cm ^{–2 ）。}改变 LMO 干电极中的导电添加剂表明，就电导率和倍率性能而言，多壁碳纳米管 (CNT) 是干电极配方的最佳导电剂。此外，由干电极阴极（LMO）和阳极（LTO）组成的全干电极全电池具有稳定的循环性能，200次循环后容量保持率为82.8%，展示了全干电极全电池的应用范围细胞用于未来的应用。

更新日期：2023-12-08

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