Co-CoO/MnO Heterostructured Nanocrystals Anchored on N/P-Doped 3D Porous Graphene for High-Performance Pseudocapacitive Lithium Storage. Issue 15 (1st January 2019)

• Record Type: Journal Article
• Authors: Chen, Junning; Zhou, Haohao; Chen, Huanhui; An, Bohan; Deng, Libo; Li, Yongliang; Sun, Lingna; Ren, Xiangzhong; Zhang, Peixin
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 15(2019)
• Page Start: A3820
• Page End: A3829
• Publication Date: 2019-01-01
• Subjects: Batteries - Lithium -- Heterostructure -- Mn3O4 -- Pseudocapacitive lithium storage; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1251915jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Lithium ion batteries (LIBs) are extensively used in numerous applications due to their impressive energy density and low memory effect. However, the inherently diffusion-controlled lithium storage limits their high-power applications. Herein, a novel surface redox capacitive lithium storage which originates from the deep oxidation of oxides during cycling of a hybrid consisting of nitrogen/phosphorous co-doped 3D graphene networks and Co-CoO/MnO nanoparticles (NPGCM), was employed to enhance the rate performance of anode for Li-ion batteries. The combination of surface pseudocapacitance with the diffusion-related lithium storage led to an extraordinary rate capability (1170.7 mAh g −1 at 0.2 A g −1 and 258.3 mAh g −1 at 6 A g −1 ). Furthermore, the NPGCM hybrid exhibited excellent cyclic stability, showing a capacity of 397 mAh g −1 after 1300 cycles at 4 A g −1 . Electron microscopy and spectroscopic investigations suggested the pseudocapacitance is originated from Mn3 O4 generated during cycling.