Synthesis of CuS@CoS2 Double‐Shelled Nanoboxes with Enhanced Sodium Storage Properties

作者：Yongjin Fang, Bu Yuan Guan, Deyan Luan, Xiong Wen Lou · 发表于：Angewandte Chemie International Edition · 年份：2019 · DOI：10.1002/anie.201902583 · 被引用次数：259 · 研究领域：Advancements in Battery Materials、Supercapacitor Materials and Fabrication、Advanced battery technologies research

Abstract Metal sulfides have received considerable attention for efficient sodium storage owing to their high capacity and decent redox reversibility. However, the poor rate capability and fast capacity decay greatly hinder their practical application in sodium‐ion batteries. Herein, an elegant multi‐step templating strategy has been developed to rationally synthesize hierarchical double‐shelled nanoboxes with the CoS2 nanosheet‐constructed outer shell supported on the CuS inner shell. Their structure and composition enable these hierarchical CuS@CoS2 nanoboxes to show boosted electrochemical properties with high capacity, outstanding rate capability, and long cycle life.