首页|In-situ construction of MnCO3@CNTs nanosheets for high-capacity aqueous zinc ion batteries
In-situ construction of MnCO3@CNTs nanosheets for high-capacity aqueous zinc ion batteries
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Owing to severe agglomeration of manganese carbonate(MnCO3)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 MnCO3 material with carbon nanotubes(CNTs)(i.e.,MnCO3@CNTs)via a one-step solvothermal method using a hybrid modification strategy.MnCO3 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 MnCO3@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 MnCO3@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 MnCO3@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 MnCO3,but also provides the possibility of modifying more cathode materials.
manganese carbonatecathode materialsaqueous zinc ion batteriesenergy storage mechanism
LI Tao、DAI GeLiang、LIU SiYu、ZHANG JingYu、SUN AoKui
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School of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou 412007,China
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