化电解质的缩使得高效率,长周期,无树的水性三价抗电池成为可能
Irfan Ullah1, Songyang Chang1, Wentao Hou1
1Department of Chemistry, University of Puerto Rico-Rio Piedras Campus, San Juan, PR, 00925, USA.
Angewandte Chemie (International ed. in English)
|March 5, 2025
概括
水性反电池使用缩的化电解质进行了改进,以防止反的水解. 这使得用于先进电池应用的稳定,高容量的能量存储.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性三价金属电池通过多电子还氧反应提供高能量潜力.
- 反 (Sb) 提供了高容量和成本效益,但遭受Sb3+水解.
- 化Sb3+显著限制了水性反电池的性能和稳定性.
研究的目的:
- 为了克服水性电池中的Sb3+水解问题.
- 为了提高反涂层/脱落的稳定性和可逆性.
- 探索稳定在先进的储能设备中的潜力.
主要方法:
- 使用缩的化电解质形成抗氧化复合物.
- 研究电解质中的Sb3+离子的稳定机制.
- 制造和测试反二氧化 (MnO2) 和双金属电池.
主要成果:
- 缩的电解质有效地抑制了Sb3+的水解,使Sb接可逆.
- 实现高库伦比效率 (99.7%-99.8%) 和延长寿命 (7300小时).
- 展示了一个Sb‖MnO2电池,容量为309 mAh g-1和50,000个循环,以及一个具有4000小时寿命的双金属电池.
结论:
- 化电解质的度是有效的稳定水解三价酸如Sb3+.
- 这种稳定策略显著提高了水性基电池的性能.
- 这些发现为开发使用稳定高电荷密度金属离子的高性能多价电池打开了道路.
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