| 摘要: |
| 基于多金属氧酸盐（POM）在锂离子电池负极材料领域的潜在应用价值,根据文献选择了新型三价钴多金属钨酸盐Ba3[BW11O39CoⅢ（H2O）]这一稳定的无机金属杂多酸,对其作为负极材料在锂离子电池应用中的性能进行了全面的测试,并将其与二价钴多金属钨酸盐Ba3.5[BW11O39CoⅡ（H2O）]的性能做了对比. 结果表明：三价钴材料在200 mA·g-1的电流密度下循环200圈后仍能保持269.2 mAh·g-1的比容量,库伦效率达99.29%. 即使在0.2~5.0 A·g-1的电流密度下进行倍率测试,其仍表现出比二价钴材料更好的性能,在电流密度恢复到0.2 A·g-1后,比容量迅速恢复到454 mAh·g-1,证明其具有更好的稳定性和倍率性能,为后续含钴钨酸盐在锂离子电池领域的应用提供了更多的参考价值. |
| 关键词: 多金属氧酸盐（POM） 锂离子电池 负极材料 新型能源材料 |
| DOI：10.3969/J.ISSN.1000-5137.2024.01.004 |
| 分类号:O 611.3 |
| 基金项目:上海市自然科学基金（22ZR1445900）； 国家自然科学基金面上项目（21772123）； 上海绿色能源化工工程技术研究中心（18DZ2254200）； 光化学能源材料学科创新引智基地（D18020）； 上海市部分地方院校能力建设专项（21010503400） |
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| The cyclic performance of cobalt-contained tungstates in lithium-ion batteries |
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HUANG Chengxin, ZHU Rui, YANG Lei, ZHU Xin, WANG Liwei, XU Jingjing
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College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China
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| Abstract: |
| Considering the potential application of polyoxometalates（POMs） as anode materials in the field of lithium-ion batteries, we selected a novel trivalent cobalt POM Ba3[BW11O39CoⅢ（H2O）], a stable inorganic metal heteropolyacid, according to the literatures. Its performance as an anode material in lithium-ion batteries was comprehensively tested and compared with that of a divalent cobalt polyoxotungstate Ba3.5[BW11O39CoⅡ（H2O）]. The results show that even after 200 cycles at a current density of 200 mA·g-1, the trivalent cobalt material can still maintain a specific capacity of 269.2 mAh·g-1 with a Coulombic efficiency of 99.29%. Furthermore, the rate tests at the current density range from 0.2 to 5.0 A·g-1 show that the trivalent cobalt material still exhibits better performance than divalent one. After the current density recovers to 0.2 A·g-1, the specific capacity quickly recovers to 454 mAh·g-1, demonstrating that the trivalent cobalt material has better stability and rate performance. These findings provide valuable references for the future application of cobalt-contained tungstates in the field of lithium-ion batteries. |
| Key words: polyoxometalate（POM） lithium-ion batteries anode materials novel energy materials |
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