为Ni-Zn电池合成无形-氧化
Poongodi Ayyanusamy1, Swathi Tharani D2, Ruby Alphonse2
1Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia.
Chemistry (Weinheim an der Bergstrasse, Germany)
|August 8, 2024
概括
与晶体NiCo2O4 (NCO) 相比,无形-氧化 (NC(OH)) 在-电池中通过热水合成的表现优越. 这种简单的方法为开发先进的双金属氧化物材料提供了一种有效的策略,以实现最佳的能量储存.
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:
- 开发高性能电极材料对于推进储能技术至关重要.
- 基于-的材料是可充电电池的有希望的候选者,因为它们的电化学特性.
- 热水合成为受控材料制造提供了一条通用途径.
研究的目的:
- 开发一种简单的热水制方法来合成无形的Ni-Co氧化物 (NC(OH)) 和晶体NiCo2O4 (NCO).
- 为了评估NC(OH) 和NCO作为-电池的阴极材料的电化学性能.
- 调查影响电池性能的结构和形态特征.
主要方法:
- 通过热水合成,用水作为溶剂生产无形的Ni-Co氧化物 (NC(OH)) 和随后的晶体NiCo2O4 (NCO).
- 用X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 来进行材料表征.
- 电化学性能使用循环电压测量 (CV) 和静电电荷-放电循环在CR2032硬币电池配置与Ni-Zn电池设置中进行评估.
主要成果:
- 与晶体NCO相比,无形NC(OH) 的电化学性能优于晶体NCO,容量为268 mAhg-1而不是120 mAhg-1在1Ag-1.1.
- 在500个循环后,NC(OH) 阴极保持了85%的容量,并表现出了显著的速率能力.
- 该Ni-Zn电池实现了高能量和功率密度 (428.8 Wh Kg-1和2.68 kW Kg-1),超过了水性可充电电池的典型值.
结论:
- 简单的热水合成提供了一个有效的策略,用于准备无形的Ni-Co氧化物,用于高性能储能.
- 降低的结晶性和氧化物形式的Ni和Co的存在有助于NC(OH) 的电化学活性增强.
- 开发的Ni-Zn电池系统显示出在储能领域实际应用的巨大潜力.
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