Free-standing ultrathick LiMn_(2)O_(4)@single-wall carbon nanotubes electrode with high areal capacity

作     者：Yuntao Guo Xinhai Li Zhixing Wang Jiexi Wang Huajun Guo Guochun Yan Yuntao Guo;Xinhai Li;Zhixing Wang;Jiexi Wang;Huajun Guo;Guochun Yan

作者机构：School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083HunanChina Engineering Research Center of the Ministry of Education for Advanced Battery MaterialsCentral South UniversityChangsha 410083HunanChina Hunan Provincial Key Laboratory of Nonferrous Value-added MetallurgyCentral South UniversityChangsha 410083HunanChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第10期

页      面：452-459,I0012页

核心收录：

学科分类：0808[工学-电气工程] 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）] 

基　　金：financial support from the National Natural Science Foundation of China(52122407,52174285,and 51974370) the Program of Huxiang Young Talents(2019RS2002) the Innovation and entrepreneurship project of Hunan Province,China(Grant No.2020GK4051) 

主　　题：Thick electrodes Free-standing High areal capacity Concentration polarization 

摘      要：The ever-increasing demands for advanced lithium-ion batteries with high energy density have greatly stimulated the pursuit of thick electrodes with high active material ***,it is not feasible to prepare thick electrodes with traditional coating methods due to mechanical ***,using single-wall carbon nanotubes(SWCNT)as conductive carbon and binder,free-standing LiMn_(2)O_(4) thick electrodes(F-LMO)with ultrahigh-mass loading up to~190 mg cm^(-2)were prepared by vacuum filtration combined with *** thick electrodes with~30 mg cm^(-2)mass loading achieved a high specific capacity of 106.7 mAh g^(-1)with a good capacity retention of 94%over 50 cycles at 0.5 C,which was superior to the traditional coating electrodes(~20 mg cm^(-2))of 99.3 mAh g^(-1)with 95%because of the enhanced electronic conductivity originated from *** addition,the high active material ratio of 97.5 wt%,near-theoretical reversible capacity,and high mass loading gave ultrathick F-LMO electrodes(600μm)of~190 mg cm^(-2)with a remarkable areal capacity of 20 mAh cm^(-2).Moreover,the concentration polarization that occurred in the thick F-LMO electrodes under high current density was discussed via electrochemical stimulation.