Towards rechargeable Na-SexSy batteries: From fundamental insights to improvement strategies
Publication Name
Chemical Engineering Journal
Abstract
Advanced Na-SexSy batteries provide a good chance to take full advantage of rich Na resources in the earth's crust as well as to combine the high capacity of S with the high electronic conductivity of Se, which are expected to become a new high-energy density electrochemical energy storage system. Herein, we offer a comprehensive review of recent advances in advanced Na-SexSy battery system with a focus on fundamental insights into its chemistry, materials design, and potential improvement strategies. Firstly, the electrochemical mechanisms of Na-SexSy batteries are presented to deepen the understanding of electrochemical principle. Then, the main challenges facing such a new system are summarized, encompassing low reactivity of SexSy with a low Se ratio, shuttle effect of intermediates, large volumetric variation, and sodium dendritic growth., Next, we discuss the design strategies of cathode materials for Na-SexSy batteries in detail, involving their synthesis, properties, interactions, and electrochemical performance. More critically, some promising solutions to cope with existing issues of Na-SexSy batteries are discussed. At last, the prospective of the Na-SexSy batteries is evaluated with an aim of guiding future developmental directions.
Open Access Status
This publication is not available as open access
Volume
442
Article Number
136189
Funding Number
DP200100365
Funding Sponsor
Australian Research Council