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Self-reductive synthesis of MXene/Na0.55Mn1.4Ti0.6O4 hybrids for high-performance symmetric lithium ion batteries.

Zou, Guodong; Ge, Bingcheng; Zhang, Hao; Zhang, Qingrui; Fernandez, Carlos; Li, Wen; Huang, Jianyu; Peng, Qiuming

Authors

Guodong Zou

Bingcheng Ge

Hao Zhang

Qingrui Zhang

Carlos Fernandez

Wen Li

Jianyu Huang

Qiuming Peng



Abstract

Increasing environmental problems and energy challenges have created an urgent demand for the development of green and efficient energy-storage systems. The search for new materials that could improve the performance of Li-ion batteries (LIBs) is one of today's most challenging tasks. Herein, a stable symmetric LIB based on the bipolar material-MXene/Na0.55Mn1.4Ti0.6O4 was developed. This bipolar hybrid material showed a typical MXene-type layered structure with high conductivity, containing two electrochemically active redox couples, namely, Mn4+/Mn3+ (3.06 V) and Mn2+/Mn (0.25 V). This MXene/Na0.55Mn2O4-based symmetric full cell exhibited the highest energy density of 393.4 W h kg−1 among all symmetric full cells reported so far, wherein it is bestowed with a high average voltage of 2.81 V and a reversible capacity of 140 mA h g−1 at a current density of 100 mA g−1. In addition, it offers a capacity retention of 79.4% after 200 cycles at a current density of 500 mA g−1. This symmetric lithium ion full battery will stimulate further research on new LIBs using the same active materials with improved safety, lower costs and a long life-span.

Journal Article Type Article
Publication Date Apr 7, 2019
Journal Journal of Materials Chemistry A
Print ISSN 2050-7488
Electronic ISSN 2050-7496
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 7
Issue 13
Pages 7516-7525
Institution Citation ZOU, G., GE, B., ZHANG, H., ZHANG, Q., FERNANDEZ, C., LI, W., HUANG, J. and PENG, Q. 2019. Self-reductive synthesis of MXene/Na0.55Mn1.4Ti0.6O4 hybrids for high-performance symmetric lithium ion batteries. Journal of materials chemistry A [online], 7(13), pages 7516-7525. Available from: https://doi.org/10.1039/c9ta00744j
DOI https://doi.org/10.1039/c9ta00744j
Keywords Environmental problems; Energy challenges; Energy-storage systems

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