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Citation: CHEN Ling, LI Xue-Li, ZHAO Qiang, CAI Wen-Bin, JIANG Zhi-Yu. Bipolar Pulse Current Charge Method for Inhibiting the Formation of Lithium Dendrite[J]. Acta Physico-Chimica Sinica, ;2006, 22(09): 1155-1158. doi: 10.3866/PKU.WHXB20060924 shu

Bipolar Pulse Current Charge Method for Inhibiting the Formation of Lithium Dendrite

1.
Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China

Received Date: 10 March 2006
Available Online: 4 September 2006

A bipolar pulse current charge method was developed to charge lithium metal electrode in 1 mol•L−1 LiPF6/ethylene carbonate (EC):dimethyl carbonate (DMC) (1:1, V/V) electrolyte. The surface variations of lithium electrode during charge processes were investigated by in situ optical microscopic observation and impedance measurement. It was observed that lithium dendrites formed on lithium electrode during direct current (DC) charge process, but it was inhibited by bipolar pulse charge method. The results of the impedance measurement show that the surface area increases much slower in bipolar pulse current charge process than that in DC charge process. This technique may be useful for the rechargeable lithium battery.
- Lithium secondary battery;Lithium electrode;Dendrite;Battery charge;Bipolar pulse current
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