Dual Mechanism for Sodium based Energy Storage |
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Authors: | Miao Liu Junfei Zhang Zhen Sun Lu Huang Tian Xie Xianwen Wang Dong Wang Yingpeng Wu |
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Affiliation: | State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Advanced Catalytic, Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 P. R. China |
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Abstract: | A dual-mechanism energy storage strategy is proposed, involving the electrochemical process of sodium ion battery (SIB) and sodium metal battery (SMB). This strategy is expected to achieve a higher capacity than SIB, and obtain dendrite-free growth of SMB with a well-designed anode. Here, self-constructed bismuth with “sodiophilic” framework and rapid ion transmission characteristics is employed as the sodium host (anode) integrating alloy/de-alloy and plating/stripping process that suppresses the dendrite growth and overcomes the limited capacity of traditional anode. Benefited from this, the capacity (capacity contributed by alloy and plating of sodium in total) of 2000 mAh g−1 can be reached, which can retain up to 800 h at 1 A g−1. Also, the capacity of 3100 mAh g−1 can be achieved that is ≈7.7 times than that of alloyed-bismuth (Bi). This work proposes a dual-mechanism strategy to tackle the dilemma of high-performance sodium (Na) storage devices, which opens a new avenue for the development of next-generation energy storage device. |
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Keywords: | 3D Bi dendrite-free dual-mechanism high capacity |
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