A Low‐Cost and Recyclable Mg/SOCl2 Primary Battery Via Synergistic Solvation and Kinetics Regulation

Lithium/thionyl chloride (Li/SOCl2) primary batteries are appealing power solutions because of their remarkable electrochemical performances. However, their mass applications are hindered by the challenges in sustainability, cost and safety concerns owing to the employed Li chemistry. Here, magnesiu...

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Bibliographic Details
Published in:Advanced functional materials 2023-01, Vol.33 (5), p.n/a
Main Authors: Xu, Qiuchen, Geng, Shitao, Yuan, Bin, Liao, Meng, Ye, Lei, Zhao, Xiaoju, Wang, Yan, Zhang, Xiao, Wang, Shuo, Qu, Zongtao, Miao, Han, Yang, Zhibin, Gao, Yue, Wang, Bingjie, Zhou, Yongfeng, Peng, Huisheng, Sun, Hao
Format: Article
Language:English
Subjects:
Corrosion effects
Lithium
low costs
magnesium batteries
Magnesium chloride
Materials science
Optimization
Primary batteries
Reaction kinetics
recyclability
Solvation
thionyl chloride
wearable energy devices
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Summary:Lithium/thionyl chloride (Li/SOCl2) primary batteries are appealing power solutions because of their remarkable electrochemical performances. However, their mass applications are hindered by the challenges in sustainability, cost and safety concerns owing to the employed Li chemistry. Here, magnesium (Mg) chemistry is shown as a promising alternative through synergistic optimization of electrolyte solvation and electrode reaction kinetics. The first Mg/SOCl2 primary battery yields surprisingly high specific capacities up to ≈14 000 mAh g−1 at a decent discharge voltage of ≈1.67 V, which outperforms the state‐of‐the‐art Mg‐based primary batteries. In addition, it retains almost 100% of the original capacity after 20‐day reservation. The impressive battery performances are originated from the stabilized MgCl2 formation on high‐surface‐area carbon cathode and suppressed Mg anode corrosion via the Mg‐induced solvation effect. Mg/SOCl2 primary batteries are promising candidates for low‐cost and recyclable power supplies, and they thus open new avenues for the development of sustainable battery chemistries. The first Mg/SOCl2 primary battery with high cost‐effectiveness, recyclability and electrochemical performance is achieved by rational regulation of electrolyte solvation and reaction kinetics, unlocking sustainable Mg metal redox toward next‐generation power supplies.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202210343