接近高性能储存材料的CoNiO2微球包裹了煤焦油口衍生的多孔碳
Nan Zhang1,2, Si-Yu Qi1,2, Ya-Fei Guo1,2
1School of Materials Science and Engineering, Northeastern University, Shenyang 110819, PR China. tfyihit@163.com.
Dalton transactions (Cambridge, England : 2003)
|June 13, 2023
概括
三级过渡金属氧化物 (TMO) 在离子电池 (LIB) 中表现有前途. 这项研究开发了3D多孔CoNiO2@CTP架构,显著提高了先进的LIB阳极的电化学性能和循环耐用性.
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:
- 三级过渡金属氧化物 (TMO) 是离子电池 (LIB) 的有希望的阳极材料,因为它们的理论容量很高.
- 然而,TMO在循环过程中受到电导率差和体积膨胀的影响,限制了它们的电化学性能.
- 制定减轻这些问题的策略对于推进LIB技术至关重要.
研究的目的:
- 为高性能LIB阳极设计和合成新的3D多孔CoNiO2@CTP架构.
- 研究微球形态学和煤焦油中衍生的多孔碳对电化学性质的协同效应.
- 为在能源存储应用中利用煤焦油提供一个具有成本效益的方法.
主要方法:
- 使用一阶段的热水处理方法,然后进行热处理,以合成CoNiO2@CTP架构.
- 合成的材料使用各种技术进行了表征,以确认它们的结构和形态.
- 通过电荷-放电循环,速率能力测试和循环耐用性测试来评估电化学性能.
主要成果:
- 3D多孔CoNiO2@CTP架构有效地增强了接触区域,并缩短了离子运输通路.
- 煤焦油 (CTP) 衍生出的多孔碳层提高了电子导电性,并为离子储存提供了活跃地点.
- CoNiO2@CTP (10.0 wt%) 阳极在500mAg-1时表现出1437.5mAhg-1的高充电能力,在1Ag-1时表现出色的速率性能 (839.76mAhg-1),以及在1000个Ag-1循环后显著的循环耐用性 (741.4mAhg-1).
结论:
- 在CoNiO2@CTP架构中,多孔碳和微球形态的协同集成显著改善了与原始CoNiO2相比的电化学性能.
- 本研究提出了一项可行的战略,用于高价值的煤焦油用于开发LIBs的先进阳极材料.
- 开发的CoNiO2@CTP架构为高性能离子电池提供了具有成本效益的解决方案.
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