Influence of CsNO3 as electrolyte additive on electrochemical property of lithium anode in rechargeable battery

Lithium metal is one of the most promising anode materials for rechargeable battery with high energy density, but its practical use is still hindered by two main problems, namely, lithium dendrite growth and low Coulombic efficiency. To address the issues, cesium nitrate (CsNO 3 ) is selected as the...

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Bibliographic Details
Published in:Journal of Central South University 2018-04, Vol.25 (4), p.719-728
Main Authors: Lin, Hua, Chen, Kang-hua, Shuai, Yi, He, Xuan, Ge, Ke
Format: Article
Language:English
Subjects:
Anodes
Batteries
Cesium
Dendritic structure
Efficiency
Electrochemical analysis
Electrode materials
Electrolytes
Electrolytic cells
Engineering
Flux density
Lithium
Lithium batteries
Metallic Materials
Rechargeable batteries
Storage batteries
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Summary:Lithium metal is one of the most promising anode materials for rechargeable battery with high energy density, but its practical use is still hindered by two main problems, namely, lithium dendrite growth and low Coulombic efficiency. To address the issues, cesium nitrate (CsNO 3 ) is selected as the additive to modify the electrolyte for lithium secondary battery. Here we report electrochemical performance of lithium secondary battery with different concentration of CsNO 3 as electrolyte additive. The study result demonstrates that Coulombic efficiency of Li—Cu cells and the lifetime of symmetric lithium cells contained CsNO3 additive are improved greatly. Li—Cu cell with 0.05 mol/L CsNO 3 and 0.15 mol/L LiNO 3 as electrolyte additive presents the best electrochemical performance, having the highest Coulombic efficiency of around 97% and the lowest interfacial resistance. With increasing the concentration of CsNO 3 as electrolyte additive, the electrochemical performance of cells becomes poor. Meanwhile, the morphology of lithium deposited films with CsNO 3 -modified electrolyte become smoother and more uniform compared with the basic electrolyte.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-018-3776-x