CoS_(2)/S-Doped C with In Situ Constructing Heterojunction Structure for Boosted K-lon Diffusion and Highly Efficient Storage

作     者：Zhipeng Zhao Xiangdong Pei Jiang Li Yanchao Qin Chuanqi Li Jingyun Cheng Yongzhu Fu Xin Du Dan Li 

作者机构：College of ChemistryZhengzhou UniversityZhengzhou 450001China Green Catalysis CenterZhengzhou UniversityZhengzhou 450001China State Key Laboratory of Chemistry and Utilization of Carbon Based Energy ResourcesCollege of ChemistryXinjiang UniversityUrumqi 830046China College of ComputerNational University of Defense TechnologyChangsha 410073China National Supercomputing Center in ZhengzhouZhengzhou 450001China 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2023年第6卷第6期

页      面：402-408页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：The National Natural Science Foundation of China(Grant No.21701144) Opening Foundation of State Key Laboratory of Chemistry and Utilization of Carbon-based Energy Resource of Xinjiang University(Grant No.KFKT2021004)are gratefully acknowledged 

主　　题：anode CoS_(2) DFT calculation fast ion transport potassium-ion batteries 

摘      要：Exploring the desired anode materials to address the issues of poor structural stability tardy redox kinetics caused by large potassium ionic radius are fatal for the realization of large-scale applications of potassium-ion *** this work,the feasibility to achieve promoted K^(+)storage by constructing the model of CoS_(2)enfolded in carbon was verified by the density functional theory *** the results predicted a faster electron/potassium ion transport kinetics than bare CoS_(2)by increasing electron carrier density and narrowing diffusion ***,an interfacial engineering strategy was applied and implemented to synthesize the CoS_(2)nanoparticles enveloped in the S-doped carbon(CoS_(2)/SC)under this *** as-prepared CoS_(2)/SC composite exhibited a prominent rate capability and long cycling lifespan,delivering the high capacity of 375 mA h g^(-1)at 0.2 A g^(-1)at the 100th cycle and 273 mA h g^(-1)at 2 A g^(-1)over 300 *** in/ex situ characterizations unraveled the converse mechanism of CoS_(2)/SC in K^(+)storage,showing an eventually reversible phase transformation of K_(x)CoS_(2)Co↔within the electrochemical reactions.