文献类型：期刊文献

英文题名：Iron carbodiimide as a High-reactivity anode for potassium ion batteries

作者：Zhang, Erjin[1];Wu, Suqin[1];Sun, Xinzhi[2];Wang, Bin[2];Xu, Li[1];Yi, Xianhui[3];Wang, Xuejiao[1];Lu, Bingan[3]

第一作者：Zhang, Erjin

通讯作者：Wang, XJ[1]

机构：[1]Jiangsu Univ, Inst Energy Res, Inst Micronano Optoelect & Terahertz Technol, Sch Mech Engn, Zhenjiang 212013, Peoples R China;[2]Xinxiang Univ, Phys & Elect Engn Dept, Xinxiang 453003, Peoples R China;[3]Hunan Univ, Sch Phys & Elect, Changsha 410082, Peoples R China

第一机构：Jiangsu Univ, Inst Energy Res, Inst Micronano Optoelect & Terahertz Technol, Sch Mech Engn, Zhenjiang 212013, Peoples R China

通讯机构：[1]corresponding author), Jiangsu Univ, Inst Energy Res, Inst Micronano Optoelect & Terahertz Technol, Sch Mech Engn, Zhenjiang 212013, Peoples R China.

年份：2023

卷号：453

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20224413018277);Scopus(收录号：2-s2.0-85140463351);WOS:【SCI-EXPANDED(收录号:WOS:000883752100002)】；

基金：Acknowledgements This work was financially supported by the National Natural Science Foundation of China (No. 52102259) , the Natural Science Foundation of Jiangsu (BK20210746, BK20210781) , National Nature Science Foun-dation of China (Grant No. U1904198) .

语种：英文

外文关键词：Iron carbodiimide; Metal carbodiimide; Potassium-ion battery; Rate performance; Conversion reaction

摘要：Exploring highly reactive anode materials is crucial for further development of potassium ion batteries (PIBs). Conversion-type materials have the merit of high energy density as anode for PIBs, while suffering from inferior stability and poor rate capability. Herein, we propose to utilize iron carbodiimide (FeNCN) as the anode for PIBs to achieve stable and high-rate potassium storage performance for the first time. The smaller electronegativity and strong covalent bonding structure of FeNCN facilitate improving the charge transfer kinetics of battery systems. Consequently, the FeNCN anode deliver a high reversible capacity (515 mAh/g at 50 mA g-1) and remarkable long-life span over 350 cycles with capacity retention of 90 % (133 days, current density 100 mA g-1). Moreover, the mechanism for potassium ion storage of FeNCN was revealed by in-situ XRD, ex-situ XPS, and FT-IR. The feasibility of FeNCN as an anode for PIBs paves the way for transition metal (Cr, Mn, Fe, and Co) carbodiimides to be investigated as potential energy storage materials.