In-situ construction of MnCO_(3)@CNTs nanosheets for high-capacity aqueous zinc ion batteries  

作　　者：LI Tao DAI GeLiang LIU SiYu ZHANG JingYu SUN AoKui 

机构地区：[1]School of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou 412007,China

出　　处：《Science China(Technological Sciences)》2024年第11期3394-3404,共11页中国科学（技术科学英文版）

基　　金：supported by the Scientific Research Project of Hunan Provincial Department of Education(Grant No.21A0363)。

摘　　要：Owing to severe agglomeration of manganese carbonate(MnCO_(3))during its synthesis,it exhibits rapid decay cycle performance when used as a cathode material in aqueous zinc ion batteries.To overcome this drawback,we synthesized a MnCO_(3)material with carbon nanotubes(CNTs)(i.e.,MnCO_(3)@CNTs)via a one-step solvothermal method using a hybrid modification strategy.MnCO_(3)nanospheres were grown in-situ on a two-dimensional(2D)plane that was orderly interwoven by tubular single fibers of carbon to form a leaf-like nanosheet structure.The surface area of the MnCO_(3)@CNTs material was enlarged enormously through the special nanosheet structure,and its stability was improved by the supporting structure of the CNTs.As a result,the MnCO_(3)@CNTs exhibited a discharge capacity of 247.6 mAh g^(-1)at a current density of 0.1 A g^(-1).The energy storage mechanism of MnCO_(3)@CNTs was further explored using a series of electrochemical kinetic analyses and ex-situ characterization tests.This modification method not only broadens the application field of MnCO_(3),but also provides the possibility of modifying more cathode materials.

关 键 词：manganese carbonate cathode materials aqueous zinc ion batteries energy storage mechanism 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]