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Title: A Long‐Cycle‐Life Lithium–CO 2 Battery with Carbon Neutrality
Abstract

Lithium–CO2batteries are attractive energy‐storage systems for fulfilling the demand of future large‐scale applications such as electric vehicles due to their high specific energy density. However, a major challenge with Li–CO2batteries is to attain reversible formation and decomposition of the Li2CO3and carbon discharge products. A fully reversible Li–CO2battery is developed with overall carbon neutrality using MoS2nanoflakes as a cathode catalyst combined with an ionic liquid/dimethyl sulfoxide electrolyte. This combination of materials produces a multicomponent composite (Li2CO3/C) product. The battery shows a superior long cycle life of 500 for a fixed 500 mAh g−1capacity per cycle, far exceeding the best cycling stability reported in Li–CO2batteries. The long cycle life demonstrates that chemical transformations, making and breaking covalent CO bonds can be used in energy‐storage systems. Theoretical calculations are used to deduce a mechanism for the reversible discharge/charge processes and explain how the carbon interface with Li2CO3provides the electronic conduction needed for the oxidation of Li2CO3and carbon to generate the CO2on charge. This achievement paves the way for the use of CO2in advanced energy‐storage systems.

 
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NSF-PAR ID:
10459712
Author(s) / Creator(s):
 ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  
Publisher / Repository:
Wiley Blackwell (John Wiley & Sons)
Date Published:
Journal Name:
Advanced Materials
Volume:
31
Issue:
40
ISSN:
0935-9648
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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    Acknowledgment

    This work was partially supported by the U.S. National Science Foundation (NSF) Award No. ECCS-1931088. S.L. and H.W.S. acknowledge the support from the Improvement of Measurement Standards and Technology for Mechanical Metrology (Grant No. 22011044) by KRISS.

    Figure 1

     

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