Lithium ion storage ability, supercapacitor electrode performance, and photocatalytic performance of tungsten disulfide nanosheets†,New Journal of Chemistry

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Lithium ion storage ability, supercapacitor electrode performance, and photocatalytic performance of tungsten disulfide nanosheets†
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2018-02-26 00:00:00 , DOI: 10.1039/c8nj00018b
Mohd Zahid Ansari _{1,

2,

3,

4} , Sajid Ali Ansari _{2,

4,

5,

6,

7} , Nazish Parveen _{2,

4,

5,

6} , Moo Hwan Cho _{2,

4,

5,

6} , Taeseup Song _{4,

8,

9,

10}

Affiliation

Although tungsten disulfide (WS₂), an analogue of graphite, has long been pursued as a promising energy storage material due to its unique layered structure, structural changes, volumetric expansion and poor electronic conductivity have limited its practical use. Here, we report the synthesis of porous WS₂ composed of a few layered nanosheets (P-WS₂) using a simple and scalable hydrothermal method, as well as its electrochemical properties when used for a lithium storage electrode, a supercapacitor electrode, and a visible light active photocatalytic material. P-WS₂ as an anode for lithium-ion batteries showed a high specific capacity of 292 mA h g⁻¹ at a current density of 0.2C with excellent cycling stability over 100 cycles. The half-cell electrochemical assembly test demonstrated that P-WS₂ delivered 241.5 F g⁻¹ at a current density of 0.75 A g⁻¹ and showed excellent stability over 2000 consecutive charge–discharge cycles. P-WS₂ nanosheets exhibited 10 times higher photocatalytic activity than bulk commercial WS₂ (C-WS₂) for the degradation of Rhodamine B dye under visible light irradiation. The excellent performance of P-WS₂ is due to its sheet-like structure, porous characteristics, and high surface area.

中文翻译：

二硫化钨纳米片的锂离子存储能力，超级电容器电极性能和光催化性能†

尽管二硫化钨（WS ₂）（一种石墨类似物）由于其独特的层状结构，结构变化，体积膨胀和不良的电导率而长期以来一直被视为有前途的储能材料，从而限制了其实际应用。在这里，我们报道了使用简单且可扩展的水热法合成由几层纳米片（P-WS ₂）组成的多孔WS _2的方法，以及当其用于锂存储电极，超级电容器电极和阳极电极时的电化学性能。可见光活性光催化材料。作为锂离子电池阳极的P-WS ₂具有292 mA hg ^-1的高比容量在0.2C的电流密度下，在100次循环中具有出色的循环稳定性。半电池电化学组装测试表明，P-WS ₂在0.75 A g ^-1的电流密度下输送了241.5 F g ^-1，并且在2000个连续的充放电循环中显示出出色的稳定性。P-WS ₂纳米片在可见光照射下对若丹明B染料的降解表现出比批量商业WS ₂（C-WS ₂）高10倍的光催化活性。P-WS ₂的出色性能归因于其片状结构，多孔特性和高表面积。

更新日期：2018-02-26

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