Mn-Doped Ni/Co LDH Nanosheets Grown on the Natural N-Dispersed PANI-Derived Porous Carbon Template for a Flexible Asymmetric Supercapacitor,ACS Sustainable Chemistry & Engineering

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Mn-Doped Ni/Co LDH Nanosheets Grown on the Natural N-Dispersed PANI-Derived Porous Carbon Template for a Flexible Asymmetric Supercapacitor
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-05-22 00:00:00 , DOI: 10.1021/acssuschemeng.9b01343
Junming Cao ₁ , Junzhi Li ₁ , La Li ₁ , Yu Zhang ₁ , Dong Cai ₁ , Duo Chen ₁ , Wei Han _{1,

2}

Affiliation

The Mn doping effect (Mn²⁺ ⇋ Mn³⁺ ⇋ Mn⁴⁺) has been proven to be an efficient method to improve the specific capacitance and rate properties of the supercapacitor. Hence, in this article, we deposited Mn ions into Ni–Co-layered double hydroxide (MLDH) nanosheet-coated polyaniline (PANI)-derived carbon (PAC), which shows a 4-fold increase in specific capacity (from 310.02 to 1282.06 C/g). Furthermore, in order to widen the voltage window and increase the energy density, a flexible all-solid-state asymmetric supercapacitor is also fabricated by employing [email protected] as a positive electrode and, respectively, nitrogen/oxygen self-doped PAC as a negative electrode. Noticeably, the assembled asymmetric devices with a wide voltage window of 1.6 V exhibit a high energy density of 78.9 Wh kg^–1 at a power density of 1.55 kW kg^–1, the long-term cyclic stability with 82.66% capacitance retention after 10 000 cycles, and reliable flexibility. Such excellent results will offer a feasible and effective Mn doping approach to prepare a hybrid electrode nanomaterial for energy storage devices.

中文翻译：

天然N分散PANI衍生的多孔碳模板上生长的Mn掺杂Ni / Co LDH纳米片，用于柔性不对称超级电容器

Mn的掺杂效果（Mn 2 ⁺ ⇋Mn ³⁺ ⇋Mn ⁴⁺）已被证明是一种改善超级电容器的比电容和速率特性的有效方法。因此，在本文中，我们将Mn离子沉积到了Ni-Co层双氢氧化物（MLDH）纳米片涂覆的聚苯胺（PANI）衍生的碳（PAC）中，这显示出比容量增加了4倍（从310.02增加到1282.06 C / g）。此外，为了拓宽电压窗口并增加能量密度，还分别通过使用[email protected]作为正电极和分别采用氮/氧自掺杂的PAC作为阳极来制造柔性全固态非对称超级电容器。负极。值得注意的是，组装后的不对称器件具有1.6 V的宽电压窗口，在1.55 kW kg ^–1的功率密度下显示出78.9 Wh kg ^–1的高能量密度。，10000次循环后的电容保持率为82.66％的长期循环稳定性以及可靠的灵活性。如此优异的结果将为制备用于储能装置的混合电极纳米材料提供一种可行且有效的Mn掺杂方法。

更新日期：2019-05-22

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