材料科学
储能
超级电容器
电容
电极
拉曼光谱
电化学
功率密度
纳米技术
化学工程
硅
分析化学(期刊)
光电子学
化学
物理化学
功率(物理)
热力学
物理
色谱法
光学
工程类
作者
Sakshi Juyal,Abhilasha Mishra,Fateh Singh Gill,Vivechana Agarwal,Pradeep Juneja,Brijesh Prasad,Sarita Chandra,Asia Parveen
标识
DOI:10.1016/j.electacta.2023.143544
摘要
Charge storage study using βMnO2 octahedrons has not been studied due to its relatively lower capacitive property. This work presents the charge storage capacity of truncated βMnO2 octahedral microparticles decorated onto micro-sized silicon (mSi) prepared by simple cost-effective and environment-friendly hydrothermal method. The designed truncated MnO2 octahedrons- mSi observed through SEM, when structurally characterized using XRD and Raman spectroscopy revealed the β phase of MnO2. The 3-electrode cell-based charge storage study demonstrated a specific capacitance of 353 F g−1 at 5 mV s−1 with an equivalent series resistance (ESR) of 10.29 ohms. The CV curves revealed a pseudocapacitive charge storage behavior with reversible Faradaic reactions and confirmed through charge storage kinetics evaluation using power law. An attractive energy density of 97.75 Wh kg−1 and 1700 W kg−1 power density was displayed by the electrode at 1.7 A g−1 current density which is comparable to existing literature in the field. This study not only opens the possibility of exploring the practical applicability of the enhanced charge storage capability using the proposed design but also stimulates further research on doped βMnO2 with suitable conductive material to reduce ESR. In addition, the role of mSi can be further explored to provide enhanced energy storage applications.
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