球形氧化锌/石墨烯复合材料的制备及其对铅酸电池循环寿命的影响 |
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引用本文: | 徐绮勤,马国正,吴宝珠,陈红雨. 球形氧化锌/石墨烯复合材料的制备及其对铅酸电池循环寿命的影响[J]. 华南师范大学学报(自然科学版), 2020, 52(2): 46-52. DOI: 10.6054/j.jscnun.2020026 |
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作者姓名: | 徐绮勤 马国正 吴宝珠 陈红雨 |
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作者单位: | 华南师范大学化学学院,广州 510006 |
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基金项目: | 广州市民生科技项目;国家自然科学基金 |
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摘 要: | 采用水热法制备了球形氧化锌/石墨烯(S-ZnO/rGO)复合材料,首先采用水热法制备S-Zn O,再将氧化石墨(GO)和S-Zn O的混合水溶液在180℃下水热反应12 h,最终得到S-ZnO/rGO复合材料.以S-ZnO/rGO复合材料为铅酸蓄电池负极添加剂,探究了0.5%、1.0%、1.5%、2.0%这4种添加质量分数对铅酸电池电化学性能的影响.电化学测试结果表明:电池在高倍率部分荷电状态(HRPSoC)下的循环寿命随着复合材料添加质量分数的增加先增大后减小,其中掺入1.0%S-ZnO/rGO复合材料的电池在HRPSoC下循环性能最好,寿命可达19 158次,比普通铅酸蓄电池的寿命(7 210次)延长了165.7%.由此表明添加S-ZnO/rGO复合材料能够改善负极板的硫酸盐化现象,从而提高电池的循环稳定性.
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关 键 词: | S-ZnO/rGO复合材料 水热法 铅酸电池 HRPSoC循环寿命 |
收稿时间: | 2019-02-19 |
The Synthesis of S-ZnO/rGO Composite Material and the Cycle Performance of Lead Acid Battery |
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Affiliation: | School of Chemistry, South China Normal University, Guangzhou 510006, China |
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Abstract: | A simple and effective method was developed for preparing spherical zinc oxide/graphene (S-ZnO/rGO) composite material. In the synthesis process, GO prepared with the modified Humm3' method was dissolved in deionized water and mixed with S-ZnO powder. Then, the homogeneous solution was transferred to 100 mL PTFE lined stainless-steel autoclave and put into an oven at 180 ℃ for 12 h. The product was obtained with freeze-drying for 48 h. Subsequently, it was incorporated into the negative active materials at different dosages (0.5%, 1.0%, 1.5% and 2.0%) to prepare lead-acid batteries. The electrochemical properties of the batteries were studied. According to the results, the cycle life of the battery under the high-rate partial-state-of-charge (HRPSoC) condition showed the trend of first increasing and then decreasing with the doping amount of the S-ZnO/rGO composites increasing. The battery with 1.0% S-ZnO/rGO composite exhibited the best performance of HRPSoC cycle life, reaching 19 158 cycles, and it was improved by more than 165% compared with that of the ordinary lead-acid battery (7 210 cycles). |
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