High‐performance porous lead/graphite composite electrode for bipolar lead‐acid batteries |
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| Authors: | Xiaoshi Lang Yao Xiao Kedi Cai Lan Li Qingguo Zhang Rui Yang |
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| Affiliation: | 1. College of New Energy, BOHAI University, Jinzhou, PR China;2. Liaoning Province Research Center for Engineering Technology of Super Capacity, BOHAI University, Jinzhou, China;3. College of Chemistry and Chemical Engineering, BOHAI University, Jinzhou, China;4. Analysis and Testing Center of Bohai University, BOHAI University, Jinzhou, China |
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| Abstract: | In general, thicker active material bipolar electrode's specific capacity and cycle life are very poor owing to its low bonding strength between the active material and the substrate and the diffusion rate of the sulfuric acid electrolyte inside the active material. In this paper, we synthesize a novel attached and porous lead/graphite composite electrode for bipolar lead‐acid battery and can effectively solve these problems. The graphite/polytetrafluoroethylene emulsion is employed to improve the bonding strength and conductivity and the porous can provide electrolyte diffusion channels. The specific capacities of 2‐mm thick positive active material at 0.25, 0.5, 1 and 2 C can attain 75.99, 58.98, 47.97, and 33.36 mAh·g?1. The discharge voltage platform is also relatively high and no rapid decline with increasing discharge rate. Furthermore, after 80 cycles, the specific capacity does not drop evidently. Copyright © 2017 John Wiley & Sons, Ltd. |
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| Keywords: | bipolar lead‐acid battery attached and porous lead/graphite composite electrode thicker active material electronic conduction electrolyte diffusion |
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