NiS_(2) nanosheet arrays on stainless steel foil as binder-free anode for high-power sodium-ion batteries

作     者：Mou-Ping Fan You-Chen Chen Yuan-Mao Chen Ze-Xi Huang Wen-Li Wu Pan Wang Xi Ke Shu-Hui Sun Zhi-Cong Shi Mou-Ping Fan;You-Chen Chen;Yuan-Mao Chen;Ze-Xi Huang;Wen-Li Wu;Pan Wang;Xi Ke;Shu-Hui Sun;Zhi-Cong Shi

作者机构：Institute of Batteries School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China énergie Matériaux et Télécommunications Center Institut National de la Recherche Scientifique (INRS)Varennes QC J3X 1S2Canada 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第4期

页      面：1294-1303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(No.21673051) the Department of Science and Technology of Guangdong Province(No.2019A050510043) the Department of Science and Technology of Zhuhai City,China(No.ZH22017001200059PWC) 

主　　题：Sulfide Sodium ion batteries Nanosheet arrays Binder-free Reaction mechanism 

摘      要：Owing to the wide range and low cost of sodium resources,sodium-ion batteries(SIBs)have received extensive attention and *** sulfides with high theoretical capacity are used as promising anode materials for *** paper presents the electrochemical performance of the binder-free NiS_(2)nanosheet arrays grown on stainless steel(SS)substrate(NiS_(2)/SS)using an in situ growth and sulfidation strategy as anode for sodium ion *** to the close connection between the NiS_(2)nanosheet arrays and the SS current collector,the NiS_(2)/SS anode demonstrates high rate capability with a reversible capacity of 492.5 mAh·g^(-1)at 5.0C *** rate capability is superior to that of NiS_(2)nanoparticles(NiS_(2)/CMC:41.7 mAh·g^(-1)at 5.0C,NiS_(2)/PVDF:7.3 mAh·g^(-1)at 5.0C)and other Ni sulfides(100–450 mAh·g^(-1)at 5.0C)***,the initial reversible specific capacity and Coulombic efficiency of NiS_(2)/SS are 786.5 mAh·g^(-1)and 81%,respec-tively,demonstrating a better sodium storage ability than those of most NiS_(2)anodes reported for *** addition,the amorphization and conversion mechanism during the sodiation/desodiation process of NiS_(2)are proposed after investigation by in situ X-ray diffraction(XRD)measurements of intermediate products at successive charge/discharge stages.