N,P-codoped graphene supported few-layered MoS2 as a long-life and high-rate anode materials for potassium-ion storage  

作　　者：Guangyao Ma Yanli Zhou Yingying Wang Zhenyu Feng Jian Yang 

机构地区：[1]Key Laboratory of Colloid and Interface Chemistry,Ministry of Education,School of Chemistry and Chemical Engineering,Shandong University,Jinan 250100,China [2]School of Environmental and Materials Engineering,Yantai University,Yantai 264005,China [3]Shandong Vocational College of Light Industry,Zibo 255300,China [4]Shenzhen Research Institute of Shandong University,Shenzhen 518000,China

出　　处：《Nano Research》2021年第10期3523-3530,共8页纳米研究（英文版）

基　　金：support from Science,Technology and Innovation Commission of Shenzhen Municipality(No.JCYJ20180305000927);Natural Science Fundamental Research Funds of Shandong University(No.2018JC023);Taishan Scholarship in Shandong Provinces(No.ts201511004);Shandong Provincial Natural Science Foundation(No.ZR2020MB048)。

摘　　要：Layer-structured MoS_(2)is regarded as a promising anode material for potassium ion batteries.Herein,MoS_(2)nanosheets on N,P-codoping reduced graphene oxide(MoS_(2)/N,P-rGO)have been successfully prepared via a facile two-step synthesis,where few-layered MoS_(2)nanosheets are chemically bonded onto the surface of N,P-rGO.As an anode material,MoS_(2)/N,P-rGO exhibits a high specific capacity(462.7 mAh·g^(-1)at 100 mA·g^(-1)over 200 cycles),outstanding rate capability(224.9 mAh·g^(-1)at 20 A·g^(-1)),and excellent cycle life(236.6 mAh·g^(-1)at 2 A·g^(-1)after 7,000 cycles),much better than those of MoS_(2)and MoS_(2)/rGO.These advanced performances outperform most of the reported anode materials for potassium ion batteries to date.Meanwhile,the K-storage reactions of MoS_(2)/N,P-rGO have been disclosed through in-situ and ex-situ characterizations.The kinetics analysis confirms that K-storage of MoS_(2)/N,P-rGO is predominant by pseudo-capacitance.

关 键 词：MoS_(2) heteroatom doping electrochemical reactions anode materials potassium-ion batteries 

分 类 号：TM91[电气工程—电力电子与电力传动]