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A compatible anode/succinonitrile-based electrolyte interface in all-solid-state Na-CO2 batteries.
Lu, Yong; Cai, Yichao; Zhang, Qiu; Liu, Luojia; Niu, Zhiqiang; Chen, Jun.
Afiliação
  • Lu Y; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) , Renewable Energy Conversion and Storage Center , College of Chemistry , Nankai University , Tianjin 300071 , China . Email: chenabc@nankai.edu.cn.
  • Cai Y; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) , Renewable Energy Conversion and Storage Center , College of Chemistry , Nankai University , Tianjin 300071 , China . Email: chenabc@nankai.edu.cn.
  • Zhang Q; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) , Renewable Energy Conversion and Storage Center , College of Chemistry , Nankai University , Tianjin 300071 , China . Email: chenabc@nankai.edu.cn.
  • Liu L; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) , Renewable Energy Conversion and Storage Center , College of Chemistry , Nankai University , Tianjin 300071 , China . Email: chenabc@nankai.edu.cn.
  • Niu Z; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) , Renewable Energy Conversion and Storage Center , College of Chemistry , Nankai University , Tianjin 300071 , China . Email: chenabc@nankai.edu.cn.
  • Chen J; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) , Renewable Energy Conversion and Storage Center , College of Chemistry , Nankai University , Tianjin 300071 , China . Email: chenabc@nankai.edu.cn.
Chem Sci ; 10(15): 4306-4312, 2019 Apr 21.
Artigo em Inglês | MEDLINE | ID: mdl-31057757
ABSTRACT
All-solid-state sodium batteries have great potential for large-scale energy storage applications. However, constructing a compatible Na anode/solid-state electrolyte (SSE) interface is still challenging because most SSEs are unstable toward Na metal. A succinonitrile (SN) SSE shows high room-temperature ionic conductivity (10-3 S cm-1) but easily deteriorates if in contact with Na metal, leading to continuously increased interfacial resistance. Here we present an extremely simple approach to introduce a compact NaF-rich interphase on a Na surface via chemical reactions between fluoroethylene carbonate-Na+ and Na metal, resulting in a compatible Na anode/SN-based electrolyte interface. The in situ formed NaF-rich interphase can not only prevent side reactions between the SN-based electrolyte and Na anode but also regulate the uniform deposition of dendrite-free Na. As a result, the symmetric cells show a low overpotential of 150 mV after cycling for 4000 h. Furthermore, all-solid-state Na-CO2 batteries (4Na + 3CO2 ↔ 2Na2CO3 + C) with the compatible interface can run for 50 cycles with a small overpotential increase of 0.33 V. This work provides a promising method to build a stable interface that enables the use of an SSE which is unstable toward Na in Na metal batteries.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: Chem Sci Ano de publicação: 2019 Tipo de documento: Artigo