Tailoring the Microstructure of Porous Carbon Spheres as High Rate Performance Anodes for Lithium-Ion Batteries

Author:

Liang Zikun1,Li Ang1,Deng Kaiming1,Ouyang Bo1,Kan Erjun1ORCID

Affiliation:

1. Department of Applied Physics, Faculty of Science, Nanjing University of Science and Technology, Nanjing 210094, China

Abstract

Benefiting from their high surface areas, excellent conductivity, and environmental-friendliness, porous carbon nanospheres (PCSs) are of particular attraction for the anodes of lithium-ion batteries (LIBs). However, the regulation of carbon nanospheres with controlled pore distribution and graphitization for delivering high Li+ storage behavior is still under investigation. Here, we provide a facile approach to obtain PCSs with different microstructures via modulating the carbonization temperatures. With the processing temperature of 850 °C, the optimized PCSs exhibit an increased surface area, electrical conductivity, and enhanced specific capacity (202 mA h g−1 at 2 A g−1) compared to the PCSs carbonized at lower temperatures. Additionally, PCSs 850 provide excellent cyclability with a capacity retention of 83% for 500 cycles. Such work can pave a new pathway to achieve carbon nanospheres with excellent performances in LIBs.

Funder

China Postdoctoral Science Foundation

NSFC

Fundamental Research Funds

Publisher

MDPI AG

Subject

General Materials Science

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