A facile synthesis of CuSe nanosheets for high-performance sodium-ion hybrid capacitors,RSC Advances

当前位置： X-MOL 学术 › RSC Adv. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A facile synthesis of CuSe nanosheets for high-performance sodium-ion hybrid capacitors
RSC Advances ( IF 3.9 ) Pub Date : 2022-08-03 , DOI: 10.1039/d2ra03206f
Chen Chen ₁ , Qilin Hu ₁ , Fan Yang ₁ , Hongyu Xue ₁ , Yuning Zhang ₁ , Hailong Yan ₁ , Yang Lu ₁ , Yongsong Luo _{1,

2}

Affiliation

Due to the low price and abundant reserves of sodium resources, sodium-ion batteries have become the main candidate for the next generation of energy storage equipment, particularly for large-scale grid storage and low-speed electric vehicles. Transition metal selenides have attracted considerable attention because of their high reversible capacity, superior electrical conductivity and versatile structures. In this study, two-dimensional CuSe nanosheets are synthesized via a simple hydrothermal reaction. When acting as an electrode material for sodium-ion batteries, the CuSe electrode exhibits an initial coulombic efficiency of 96.7% at a current density of 0.1 A g⁻¹ and a specific capacity of 330 mA h g⁻¹ after 100 operation cycles, as well as retains a specific capacity of 211 mA h g⁻¹ even at a high current density of 10 A g⁻¹. Moreover, the anode delivers a specific capacity of 236 mA h g⁻¹ after 3300 cycles at 5 A g⁻¹ with a capacity retention of 91.2%. In sodium-ion hybrid capacitors (SHICs) with the two-dimensional CuSe nanosheets and Ti₃C₂T_x MXene as the negative and positive materials, respectively, the nanosheets without any pre-sodiation present a lifespan of up to 2000 cycles at 2 A g⁻¹ and a capacity retention of about 77.7%.

中文翻译：

用于高性能钠离子混合电容器的 CuSe 纳米片的简便合成

由于钠资源价格低廉且储量丰富，钠离子电池已成为下一代储能设备的主要候选，特别是大规模电网存储和低速电动汽车。过渡金属硒化物因其高可逆容量、优异的导电性和通用的结构而引起了广泛的关注。在这项研究中，通过简单的水热反应合成了二维 CuSe 纳米片。 CuSe电极作为钠离子电池电极材料时，在0.1 A g ^-1电流密度下初始库伦效率为96.7%，100次循环后比容量为330 mA hg ^-1即使在10 A g ^-1的高电流密度下，as仍保持211 mA hg ^-1的比容量。此外，在5 A g ^-1下循环3300次后，该负极的比容量为236 mA hg ^-1 ，容量保持率为91.2%。在分别以二维 CuSe 纳米片和 Ti ₃ C ₂ T _x MXene 作为负极材料和正极材料的钠离子混合电容器 (SHIC) 中，未经任何预钠化的纳米片在 2 下的寿命高达 2000 次循环。 g ^-1和约77.7%的容量保持率。

更新日期：2022-08-03

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11