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Improvement of cycle performance of lithium ion cell LiMn2O4/LixV2O5 with aqueous solution electrolyte by polypyrrole coating on anode |
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| Authors: | Haibo Wang Kelong Huang Liquan Chen |
| Affiliation: | a College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China b Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China c Amperex Technology Limited, Dongguan 523080, China |
| Abstract: | The reasons of capacity fading during cycling process of LiMn2O4/LixV2O5 lithium ion cell with 5 M LiNO3 aqueous solution as electrolyte were investigated. XRD and ICP results showed that the properties of the anode have more impact on the cycle life of the cell. In an attempt to improve the cycle performance of the as-assembled cell, coating with an ionic conductive polypyrrole (PPy) on the surface of the anode was proposed via in situ polymerization method. Cycling tests revealed that the stability of the lithium ion cell with surface coated anode has been greatly improved. Moreover, the capability of the cell with coated anode was also enhanced compared with the cell with bare anode. |
| Keywords: | Lithium ion battery Aqueous solution electrolyte Surface coating Polypyrrole Cycle performance Anode |
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