Self-Formulated Na-Based Dual-Ion Battery Using Nonflammable SO2-Based Inorganic Liquid Electrolyte
- Authors
- Kim, Ayoung; Jung, Hojae; Song, Juhye; Lee, Jiwhan; Jeong, Goojin; Kim, Young-Jun; Kim, Hansu
- Issue Date
- Mar-2021
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- copper chloride; discharged state cathodes; inorganic electrolytes; nonmetallic anodes; sodium batteries
- Citation
- SMALL, v.17, no.9, pp.1 - 8
- Indexed
- SCIE
SCOPUS
- Journal Title
- SMALL
- Volume
- 17
- Number
- 9
- Start Page
- 1
- End Page
- 8
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/1535
- DOI
- 10.1002/smll.201902144
- ISSN
- 1613-6810
- Abstract
- Sodium secondary batteries have gained much attention as alternative power sources to replace lithium secondary batteries. However, some technical issues must be solved to ensure their success. Here, a highly safe and cost-effective Na-based dual-ion battery system employing self-formulated CuCl cathode material starting from a mixture of Cu and NaCl in conjunction with a nonflammable NaAlCl4·2SO2 inorganic liquid electrolyte is demonstrated. It is found that CuCl is spontaneously formed by redox coupling of Cu/Cu(I) and SO2/SO2− anion radical. In the proposed battery, Na+ and Cl− are employed as energy carriers for the anode and cathode, respectively, and it is further demonstrated that the Na-metal-free battery configuration is possible using a hard carbon anode. Owing to the use of cheap electrode materials and a highly conductive and safe electrolyte, the proposed batteries deserve to be regarded as a promising approach for next-generation Na rechargeable batteries.
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