Issue 44, 2021

Boosting the comprehensive performance for a Co-free high-voltage system with a multi-component nitrile

Abstract

Lithium-ion batteries with high-energy density are a hot spot in current research, and the 5 V class of high-voltage LiNi0.5Mn1.5O4 (LNMO) cathode materials attracts widespread attention because of its high specific capacity. However, the traditional electrolyte causes unnecessary reactions with the LNMO interface at high voltage, so choosing a suitable electrolyte is key to the development of the above-mentioned battery system. Here, we introduce 1,3,6-hexanetrinitrile (HTN) as the high-voltage additive to improve the oxidation stability of LNMO/Li cells. Compared with the conventional nitrile-based additive adiponitrile (ADN), the HTN additive can provide more nitrile functional groups to reduce the problem of decreased electrolyte viscosity caused by adding too much ADN. Besides, in order to improve the suboptimal performance of HTN in the mesocarbon microbead (MCMB) anode, methyl benzenesulfonate (MBS) MBS with characteristics of a protecting lithium metal anode at low potential is compounded in the electrolyte to improve the performance of LNMO/MCMB batteries. The synergy and complementary advantages of HTN and MBS improve the overall performance of the LNMO/MCMB battery system. Modification of commercial electrolyte systems with compound additives as required becomes a major direction for the future design of electrolyte formulation.

Graphical abstract: Boosting the comprehensive performance for a Co-free high-voltage system with a multi-component nitrile

Supplementary files

Article information

Article type
Paper
Submitted
25 Aug 2021
Accepted
11 Oct 2021
First published
12 Oct 2021

New J. Chem., 2021,45, 20681-20689

Boosting the comprehensive performance for a Co-free high-voltage system with a multi-component nitrile

P. Zhang, S. Li, X. Wei, C. Li, S. Meng, X. Cui, Q. Su and D. Zhao, New J. Chem., 2021, 45, 20681 DOI: 10.1039/D1NJ04080D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements