Electrodeposition of hydrated vanadium pentoxide on nanoporous carbon cloth for hybrid energy storage†,Sustainable Energy & Fuels

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Electrodeposition of hydrated vanadium pentoxide on nanoporous carbon cloth for hybrid energy storage†
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2018-01-10 00:00:00 , DOI: 10.1039/c7se00559h
Juhan Lee _{1,

2,

3,

4,

5} , Sylvain Badie _{1,

2,

3,

4,

5} , Pattarachai Srimuk _{1,

2,

3,

4,

5} , Alexander Ridder _{1,

2,

3,

4,

5} , Hwirim Shim _{1,

2,

3,

4,

5} , Soumyadip Choudhury _{1,

2,

3} , Yoon-Chae Nah _{6,

7,

8,

9,

10} , Volker Presser _{1,

2,

3,

4,

5}

Affiliation

Electrodeposition is a simple and effective method for the synthesis of disordered hydrated vanadium pentoxide (V₂O₅·nH₂O). For the synthesis of energy storage electrodes with high power performance, electrodeposition of hydrated V₂O₅ inside carbon micropores is particularly attractive to synergize electric-double layer formation and lithium ion intercalation. Here, we demonstrate that hydrated V₂O₅ can be effectively electrodeposited in carbon micropores of activated carbon cloth. Our study indicates that carbon pores larger than 1 nm are essential for the effective decoration with hydrated V₂O₅. A thermal treatment after the electrodeposition is often used to enhance the crystal structure of hydrated V₂O₅. However, thermal annealing of the hydrated vanadium pentoxide decorated activated carbon cloth under an oxygen-rich environment at high temperature (>330 °C) leads to a significant loss of pore volume, leading to a decreased electrochemical performance. At low annealing temperature (200 °C), the vanadium pentoxide electrodeposited activated carbon cloth electrode exhibits a maximum specific capacity of 137 mA h g⁻¹ with stable cycle performance over 1600 cycles at a rate of 4C.

中文翻译：

水合五氧化二钒在纳米多孔碳布上的电沉积，用于混合储能†

电沉积是一种合成无序水合五氧化二钒（V ₂ O ₅ · n H ₂ O）的简单有效的方法。为了合成具有高功率性能的储能电极，碳微孔内部的水合V ₂ O _5的电沉积特别有利于双电层的形成和锂离子的嵌入。在这里，我们证明了水合的V ₂ O ₅可以有效地电沉积在活性炭布的碳微孔中。我们的研究表明，大于1 nm的碳孔对于水合V ₂ O进行有效装饰至关重要。₅。电沉积后的热处理通常用于增强水合V₂ O₅的晶体结构。但是，在富氧环境下于高温（> 330°C）下对水合五氧化二钒装饰的活性炭布进行热退火会导致孔体积的显着损失，从而导致电化学性能下降。在低退火温度（200°C）下，五氧化二钒电沉积活性炭布电极的最大比容量为137 mA hg^-1，在1600次循环中以4C的速率具有稳定的循环性能。

更新日期：2018-01-10

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