Sulfide-based solid-state electrolytes (SSEs) are considered a key part in the realization of high-performance all solid-state lithium-ion batteries (ASSLIBs). However, the incompatibility between conductive additives and sulfide-based SSEs in the cathode composite challenges the stable delivery of high-rate capability. Herein, a poly(3,4-ethylenedioxythiophene) (PEDOT) modification is designed as a semiconductive additive for cathode composites (cathode/SSE/carbon) to realize the high performance. The modified ASSLIB demonstrates a competitive rate capacity of over 100 mAh g^–1 at 1C, which is 10 times greater than that of the bare cathode. Detailed surface chemical and structural evolutions at the cathodic interface indicate the PEDOT modification not only significantly suppresses the side reactions but also realizes effective electron transfer at the cathode/SSE/carbon three-phase interface. Introducing a controllable semiconductive additive for the cathode composites in this study offers a promising design to realize the high-rate performance and overcome long-term challenges in the application of conductive additives in sulfide-based ASSLIBs.

中文翻译：

---

消除导电剂在基于硫化物的固态电池中的有害影响

基于硫化物的固态电解质（SSE）被认为是实现高性能全固态锂离子电池（ASSLIB）的关键部分。但是，阴极复合材料中导电助剂和基于硫化物的SSE之间的不相容性挑战了高速率能力的稳定传递。在此，设计聚（3,4-亚乙二氧基噻吩）（PEDOT）改性作为阴极复合材料（阴极/ SSE /碳）的半导体添加剂，以实现高性能。改进的ASSLIB在1 C时具有超过100 mAh g ^–1的竞争速率容量，这是裸阴极的10倍。阴极界面的详细表面化学和结构演变表明，PEDOT修饰不仅显着抑制了副反应，而且在阴极/ SSE /碳三相界面上实现了有效的电子转移。在这项研究中为阴极复合材料引入可控半导体添加剂提供了一种有前途的设计，以实现高速率性能并克服将导电添加剂应用于基于硫化物的ASSLIBs中的长期挑战。