New, Effective, and Low-Cost Dual-Functional Binder for Porous Silicon Anodes in Lithium-Ion Batteries,ACS Applied Materials & Interfaces

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New, Effective, and Low-Cost Dual-Functional Binder for Porous Silicon Anodes in Lithium-Ion Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-03-22 00:00:00 , DOI: 10.1021/acsami.8b21936
Rongnan Guo ₁ , Shunlong Zhang ₁ , Hangjun Ying ₁ , Wentao Yang ₁ , Jianli Wang ₁ , Wei-Qiang Han ₁

Affiliation

In this work, a new effective and low-cost binder applied in porous silicon anode is designed through blending of low-cost poly(acrylic acid) (PAA) and poly(ethylene-co-vinyl acetate) (EVA) latex (PAA/EVA) to avoid pulverization of electrodes and loss of electronic contact because of huge volume changes during repeated charge/discharge cycles. PAA with a large number of carboxyl groups offers strong binding strength among porous silicon particles. EVA with high elastic property enhances the ductility of the PAA/EVA binder. The high-ductility PAA/EVA binder tolerates the huge silicon volume variations and keeps the electrode integrity during the charge/discharge cycle process. EVA colloids acting as host materials for electrolytes increase the electrolyte uptake of electrodes. The porous silicon electrode with the PAA/EVA binder exhibits a reversible capacity of 2120 mA h g^–1 at 500 mA g^–1 after 140 cycles because of the excellent ductility and lithium-ion transport properties of the PAA/EVA binder.

中文翻译：

用于锂离子电池中多孔硅阳极的新型高效低成本双功能粘合剂

在这项工作中，一个新的有效的和低成本的粘合剂在多孔硅阳极通过低成本的聚（丙烯酸）（PAA）和聚的混合设计应用（乙烯-共-乙酸乙烯酯（EVA）乳胶（PAA / EVA），以避免电极粉化和电子接触损失，因为在反复的充电/放电循环中，体积会发生巨大变化。具有大量羧基的PAA在多孔硅颗粒之间提供了强大的结合强度。具有高弹性的EVA增强了PAA / EVA粘合剂的延展性。高导电性PAA / EVA粘合剂可承受巨大的硅体积变化，并在充电/放电循环过程中保持电极完整性。用作电解质主体材料的EVA胶体可增加电极对电解质的吸收。带有PAA / EVA粘合剂的多孔硅电极在500 mA g ^–1时具有2120 mA hg ^–1的可逆容量由于PAA / EVA粘合剂具有出色的延展性和锂离子传输性能，因此在140次循环后仍可保持稳定。

更新日期：2019-03-22

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