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In Situ Growth of 3D Lamellar Mn(OH)2 on CuO-Coated Carbon Cloth for Flexible Asymmetric Supercapacitors with a High Working Voltage of 2.4 V
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-09-23 , DOI: 10.1021/acssuschemeng.1c05164
Shen-Gen Gong 1 , Yan-Hong Shi 2 , Yang Su 1 , Yan-Fei Li 1 , Lei Ding 1 , Jian Lin 1 , Guo-Duo Yang 1 , Bing Li 1 , Xing-Long Wu 1 , Jing-Ping Zhang 1 , Hai-Ming Xie 1 , Hai-Zhu Sun 1
Affiliation  

Flexible asymmetric supercapacitor (FASC) systems are expected to exhibit not only excellent energy storage properties and safety but also satisfactory flexibility and robust integration. However, tremendous issues such as low capacitance, narrow voltage window, and poor mechanical properties still exist. In this paper, a novel kind of 3D lamellar Mn(OH)2 nanosheets on Cu-plated carbon cloth with a core-shell integrated framework (CPCC@CuO@Mn(OH)2) is fabricated to obtain the flexible material in the FASC. In this unique CPCC@CuO@Mn(OH)2 electrode material, the high theoretical specific capacity of CuO and Mn(OH)2 brings superior energy storage properties. Meanwhile, as the shell part, the deposited Mn(OH)2 layer and coated CuO layer work as both capacity contributors and substrate protectors, simultaneously maintaining the high capacitance and satisfactory flexibility of the electrodes. Therefore, the capacitance successfully achieves around 8140 mF cm–2 under 0.5 mA cm–2. Significantly, the assembled FASC (named as CPCC@CuO@Mn(OH)2//CC@AC) achieves a working voltage of up to 2.4 V. In the case of a high-power density close to 34.31 mW cm–3, its energy density reaches around 6.29 mW h cm–3. Moreover, the capacity holds 88.9% even after 10,000 cycles, showing its great application potential in the field of wearable electronics.

中文翻译:

3D 层状 Mn(OH)2 在 CuO 涂层碳布上原位生长,用于具有 2.4 V 高工作电压的柔性非对称超级电容器

柔性非对称超级电容器 (FASC) 系统不仅具有出色的储能性能和安全性,而且具有令人满意的灵活性和稳健的集成。然而,电容低、电压窗口窄、机械性能差等巨大问题仍然存在。在本文中,在具有核壳集成框架(CPCC@CuO@Mn(OH) 2)的镀铜碳布上制造了一种新型3D层状Mn(OH) 2纳米片,以获得FASC中的柔性材料。 . 在这种独特的CPCC@CuO@Mn(OH) 2电极材料中,CuO和Mn(OH) 2的高理论比容量带来了优越的储能性能。同时,作为壳部分,沉积的 Mn(OH) 2层和涂覆的 CuO 层作为容量贡献者和基板保护器,同时保持电极的高电容和令人满意的柔韧性。因此,电容在 0.5 mA cm –2下成功达到 8140 mF cm –2左右。值得注意的是,组装的 FASC(命名为 CPCC@CuO@Mn(OH) 2 //CC@AC)实现了高达 2.4 V 的工作电压。在接近 34.31 mW cm –3的高功率密度的情况下,其能量密度达到约 6.29 mW h cm –3。此外,10000次循环后容量仍保持88.9%,显示出其在可穿戴电子领域的巨大应用潜力。
更新日期:2021-10-04
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