对相互连接的WS2纳米板的超容性能进行实验和理论见解
Shilpi Sengupta1, Silda Peters2, Tumpa Sadhukhan2
1Electrochemical Energy Storage Laboratory, Department of Chemistry, SRM Institute of Science and Technology, Chennai, Tamil Nadu 603203, India.
Physical chemistry chemical physics : PCCP
|March 18, 2024
概括
我们合成了相互连接的二硫化物 (WS2) 纳米片用于储能. 这些WS2纳米板表现出极好的电容性和稳定性,使它们成为超级电容器应用的前景.
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
- 纳米技术纳米技术
背景情况:
- 过渡金属二化物 (TMD) 是电化学能量存储的关键材料,因为它们具有独特的二维结构.
- 硫化 (WS2) 为高性能储能设备提供了潜力.
研究的目的:
- 为了合成相互连接的WS2纳米片.
- 为了评估它们作为超级电容器的电极材料的性能.
- 了解它们的电化学性质的理论基础.
主要方法:
- WS2纳米板的水热合成.
- 在气氛下850°C的硫化.
- 对称超级电容器的制造.
- 电化学性能测试 (电容,循环稳定性).
- 密度功能理论 (DFT) 模拟.密度功能理论 (DFT) 模拟.
主要成果:
- 在 7000 个循环中,在 3 A g-1 时达到 74 F g-1 的特定电容.
- 制造的对称超级电容器具有高的特定容量 (6.3Fg-1在0.05Ag-1).
- 证明了高能量 (5.6 × 102 mW h kg−1) 和功率密度 (3.6 × 105 mW kg−1).
- DFT模拟证实了由于Fermi水平附近的人口能量状态的高量子容量.
结论:
- 相互连接的WS2纳米板表现出卓越的电化学性能和稳定性.
- WS2纳米板是超级电容器的有希望的,坚固的和具有成本效益的电极材料.
- 理论计算支持高电容的实验发现.
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