CuGaS2 nanoplates: a robust and self-healing anode for Li/Na ion batteries in a wide temperature range of 268–318 K†,Journal of Materials Chemistry A

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CuGaS2 nanoplates: a robust and self-healing anode for Li/Na ion batteries in a wide temperature range of 268–318 K†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-12-06 00:00:00 , DOI: 10.1039/c7ta09197d
Yun Song _{1,

2,

3,

4,

5} , Yanmei Li _{1,

2,

3,

4} , Lin Zhu _{1,

2,

3,

4} , Zhichang Pan _{1,

2,

3,

4} , Yinchang Jiang _{1,

2,

3,

4} , Pei Wang _{1,

2,

3,

4} , Yong-Ning Zhou _{1,

2,

3,

4} , Fang Fang _{1,

2,

3,

4} , Linfeng Hu _{1,

2,

3,

4} , Dalin Sun _{1,

2,

3,

4,

5}

Affiliation

The practical application of batteries in electric vehicles (EVs) and hybrid electric vehicles (HEVs) is hindered by the narrow operating temperature range due to the degradation of the solid–electrolyte interface (SEI) layer at high temperature and poor ion/electron diffusion kinetics at low temperature. Herein, we firstly report CuGaS₂ hexagonal nanoplates as a novel and robust anode material working in a wide temperature range. CuGaS₂ nanoplates with a lateral size of 2–3 μm and thickness of 180–200 nm have been successfully synthesized by a vapor thermal transformation from the oxide counterpart CuGaO₂. The thermal workability of the as-synthesized CuGaS₂ benefits from a synergistic effect including the high conductivity of copper and the self-healing nature of liquid metal gallium. Room temperature CuGaS₂ as a lithium ion battery anode electrode exhibits a high reversible capacity over 521 mA h g⁻¹ after 600 cycles at a high current density of 5 A g⁻¹. Furthermore, as the temperature is lifted to 318 K, the CuGaS₂ electrode exhibits a stable and reversible capacity over 784 mA h g⁻¹ at a high current density of 0.5 A g⁻¹; even at the low temperature of 268 K, a reversible capacity over 407 mA h g⁻¹ can be realized, which is much superior to that of the commercial graphite anode.

中文翻译：

CuGaS ₂纳米板：在268–318 K的宽温度范围内，用于Li / Na离子电池的坚固且自修复的阳极†

电池在电动汽车（EV）和混合电动汽车（HEV）中的实际应用受到狭窄的工作温度范围的阻碍，这是由于高温下固体-电解质界面（SEI）层的降解以及较差的离子/电子扩散动力学在低温下。在本文中，我们首先报道了CuGaS ₂六角形纳米板，它是一种新型且坚固的阳极材料，可在很宽的温度范围内工作。通过气相热转化，由氧化物对应的CuGaO ₂成功地合成了横向尺寸为2-3μm，厚度为180-200 nm的CuGaS ₂纳米板。合成后的CuGaS ₂的热加工性受益于协同效应，包括铜的高电导率和液态金属镓的自愈特性。作为锂离子电池阳极电极的室温CuGaS ₂在5 A g ^-1的高电流密度下经过600次循环后显示出超过521 mA hg ^-1的高可逆容量。此外，当温度升高到318 K时，CuGaS ₂电极在0.5 A g ^-1的高电流密度下在784 mA hg ^-1上表现出稳定且可逆的容量。即使在268 K的低温下，也可实现超过407 mA hg ^-1的可逆容量，这远远优于商用石墨阳极。

更新日期：2017-12-06

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