| 高能量密度全固态锂金属电池Li6.4La3Zr1.4Ta0.6O12基锂硼负极的制备及性能 |
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| 引用本文： | 陈鹏飞,冯杰仪,吴镝.高能量密度全固态锂金属电池Li6.4La3Zr1.4Ta0.6O12基锂硼负极的制备及性能[J].华南师范大学学报(自然科学版),2022,54(3):28-33. |
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| 作者姓名： | 陈鹏飞 冯杰仪 吴镝 |
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| 作者单位： | 五邑大学应用物理与材料学院，江门 529030 |
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| 基金项目： | 广东省科技创新战略专项资金项目PDJH2021b0511 |
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| 摘 要： | 采用熔融态金属锂与高纯硼粉复合制备了锂硼复合材料并应用于固态电解质(Li6.4La3Zr1.4Ta0.6O12, LLZTO)制作对称电池，对比研究了锂硼复合固态对称电池与锂金属固态对称电池的电化学性能。结果表明:锂硼复合固态电池界面阻抗(约6 Ω/cm2)小于金属锂固态电池的界面阻抗(约103 Ω/cm2)，说明锂硼复合电极和固态电解质接触良好；在400 μA/cm2的电流密度下进行充放电测试，锂硼复合固态对称电池可以稳定循环250次以上，而金属锂固态电池很快失效；锂硼复合固态对称电池在0.1 mAh保持容量下的临界电流密度达到2 700 μA/cm2，在0.1 mA/cm2电流密度下的面容量可达12 mAh/cm2。研究表明该锂硼复合固态对称电池具有优异的循环性能。
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| 关 键 词： | 锂金属负极 LLZTO固态电解质 全固态电池 |
| 收稿时间： | 2022-03-11 |
The Preparation and Performance of Li6.4La3Zr1.4Ta0.6O12-based Lithium Boron Anode for the High Energy Density All-solid-state Lithium Metal Battery |
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| Affiliation: | School of Applied Physics and Materials, Wuyi University, Jiangmen 529030, China |
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| Abstract: | The lithium-boron composite material was prepared by compounding molten metal lithium and high-purity boron powder and applied to solid electrolyte (Li6.4La3Zr1.4Ta0.6O12, LLZTO) to make the solid-state symme-tric battery. A comparative study of the electrochemical performance of the lithium-boron composite solid-state symmetric battery and the lithium metal solid-state symmetry battery was conducted. The results showed that the interface impedance (about 6 Ω/cm2) of the lithium-boron composite solid-state battery is much smaller than that of the metal lithium solid-state battery (about 103 Ω/cm2), indicating that the lithium-boron composite electrode and the solid electrolyte were in good contact. The test of charge-discharge under the current density of at 400 μA/cm2 was carried out. The lithium-boron composite solid-state symmetric battery could be stably cycled for more than 250 times while the metal lithium solid-state battery quickly failed. The critical current density of the lithium-boron composite solid-state symmetric battery at a capacity of 0.1 mAh reached 2 700 μA/cm2 and the capacity could reach 12 mAh/cm2 under the current density of 0.1 mA/cm2. The lithium-boron composite solid-state symmetric battery had excellent cycling performance. |
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