State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China.
Langmuir. 2023 Feb 21;39(7):2739-2750. doi: 10.1021/acs.langmuir.2c03219. Epub 2023 Feb 10.
The attapulgite@carbon/NiCo layered double hydroxide nanocomposites based on waste adsorbents are manufactured via simple and eco-friendly calcination and hydrothermal methods, by which they would be considerable electrode materials for advanced supercapacitors. To achieve sustainable development, the spent tetracycline-loaded attapulgite can act as a cost-effective available carbon source as well as a matrix material for carbon species and NiCo layered double hydroxide simultaneously. A controlled amount of attapulgite@carbon could be used to regulate the electrochemical properties of nanocomposites. The generated electrodes possess superior electrochemical properties with a specific capacitance of 2013.8 F g at 0.5 A g, a retention rate of 87.7% at 5 A g, and a cyclic stability of 64.9% for 4000 cycles at 5 A g. Thus, the asymmetric supercapacitor device assembled with attapulgite@carbon/NiCo layered double hydroxide nanocomposites||active carbon shows a maximum capacitance of 231.3 F g at 0.5 A g, with a preeminent energy density of 82.2 Wh kg when its power density is 4318 W kg. This approach would contribute to the development of supercapacitors in an efficient and effective manner, as well as provide a feasible strategy for solving tetracycline pollution and recycling waste adsorbents to achieve sustainable development.
基于废吸附剂的凹凸棒石@碳/ NiCo 层状双氢氧化物纳米复合材料是通过简单环保的煅烧和水热方法制造的，它们将成为先进超级电容器的重要电极材料。为了实现可持续发展，负载四环素的废凹凸棒石可以作为一种具有成本效益的可用碳源，同时也是碳物种和 NiCo 层状双氢氧化物的基质材料。控制一定量的凹凸棒石@碳可以调节纳米复合材料的电化学性能。所生成的电极具有优异的电化学性能，在 0.5 A g 时比电容为 2013.8 F g，在 5 A g 时的保留率为 87.7%，在 5 A g 时经过 4000 次循环的循环稳定性为 64.9%。因此，由凹凸棒石@碳/ NiCo 层状双氢氧化物纳米复合材料||活性炭组装的非对称超级电容器装置在 0.5 A g 时具有 231.3 F g 的最大电容，当功率密度为 4318 W kg 时，具有卓越的能量密度 82.2 Wh kg。这种方法将有助于高效有效地开发超级电容器，并为解决四环素污染和回收废吸附剂以实现可持续发展提供可行的策略。
