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- Title
Rational Design of Nanostructured Metal/C Interface in 3D Self‐Supporting Cellulose Carbon Aerogel Facilitating High‐Performance Li‐CO<sub>2</sub> Batteries.
- Authors
Liu, Limin; Qin, Yanyang; Wang, Ke; Mao, Heng; Wu, Hu; Yu, Wei; Zhang, Dongyang; Zhao, Hongyang; Wang, Hairong; Wang, Jiuhong; Xiao, Chunhui; Su, Yaqiong; Ding, Shujiang
- Abstract
The sluggish kinetics of CO2 reduction and evolution reaction (CRR and CER) on the Li–CO2 battery cathode seriously hindered its practical application. Rational design of the Ru/C interface is expected to simultaneously decrease the free energy barrier of intermediate species and create a favorable electronic structure, effectively promoting the catalytic reaction kinetics of the CRR and CER. Herein, a 3D self‐supporting cellulose carbon aerogel (CCA) with well‐defined Ru/C interfaces (Ru@CCA) is synthesized as an advanced CO2‐breathing cathode for Li–CO2 batteries. The results show that the energy efficiency significantly improves to 80% with a high discharge capacity of 10.71 mA h cm−2 at 20 µA cm−2, and excellent cyclic stability of 421 cycles at 100 µA cm−2. These outstanding performances are highly competitive compared with state‐of‐art Li–CO2 cathodes. In addition, the unique interface design strategy is applied to other non‐noble metal@CCA cathodes, which confirms the advantages of constructing nanostructure metal/C interfaces for improving the kinetics of CRR and CER. This fundamental understanding of the structure–performance relationship provides new inspiration for designing highly efficient cathode catalysts for Li–CO2 batteries.
- Subjects
AEROGELS; CELLULOSE; ACTIVATION energy; METALS; CHEMICAL kinetics; ELECTRIC batteries
- Publication
Advanced Energy Materials, 2022, Vol 12, Issue 20, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202103681