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Synthesis of hierarchically porous MnO/C composites via a sol-gel process followed by two-step combustion for lithium-ion batteries

Abstract

Hierarchically porous MnO/C composites with interconnected macropores and co-continuous skeletons were fabricated via a sol-gel process combined with phase separation, followed by two-step combustion. The MnO nanoparticles were assembled into the carbonaceous skeletons to construct hierarchical porous MnO/C composites. The resultant MnO/C composites used as active material of the lithium-ion battery exhibit outstanding specific capacity of 1107 mAh g-1 after 300 cycles at 200 mA g-1 and great rate capability with 610 mAh g-1 at 2 A g-1. Moreover the specific capacity can retain 480 mAh g-1 at 1 A g-1 after 1000 cycles. The superior electrochemical Li-storage property with a high specific capacity, great cycling durability and excellent rate performance is rationally associated with the intrinsic structural advantages and component effects derived from hierarchical porous structures. The MnO/C composites via facile sol-gel synthesis followed by two-step combustion demonstrates its potential of being applied to well-performed Li-ion batteries.

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Article information


Submitted
29 Mar 2020
Accepted
24 Jun 2020
First published
24 Jun 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

Synthesis of hierarchically porous MnO/C composites via a sol-gel process followed by two-step combustion for lithium-ion batteries

W. Liu, D. Feng, H. Yang and X. Guo, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0NJ01538E

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