Fe3O4@PPy@MnO2 ternary core-shell nanospheres as electrodes for enhanced energy storage performance

Tong, Lin; Wu, Chunxia; Hou, Junxian; Zhang, Xiaoliang; Yan, Jiayuan; Wang, Zehu; Wang, Yanming; Mu, Jingbo; Zhang, Zhixiao; Che, Hongwei

doi:10.1016/j.jelechem.2022.116725

Cited by 2 publications

(3 citation statements)

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“…For better understand the charge storage mechanism of the NCM@PPy-C electrode material, the reaction kinetics are analyzed according to the following equations: i = a v b log i = b log v + log a where i is the measured peak current (a constant) and v is the scan rate. In addition, a and b are variable values.…”

Section: Resultsmentioning

confidence: 99%

“…For better understand the charge storage mechanism of the NCM@PPy-C electrode material, the reaction kinetics are analyzed according to the following equations: 58 (10) (11) where i is the measured peak current (a constant) and v is the scan rate. electrode material are determined to be 0.69 and 0.66, signifying that the NCM@PPy-C electrode has the mixed capacitive behavior and battery behavior, mainly controlled by the diffusion process.…”

Section: Electrochemical Performance Of Ncm@ppy-cmentioning

confidence: 99%

“…57 In particular, NCM@PPy-C electrode displays the highest integral area in the cyclic voltammetry analysis when scan rate was low, indicating that NCM@PPy-C possesses the best supercapacitor performances in all the prepared electrode samples, which the subsequent GCD measurements can further verify. 58 To elucidate the electrochemical kinetics of the NCM@PPy-C electrode material, more CV curves of the as-prepared NCM@PPy-C were obtained (Figure 5b), in which the preservation of the CV curves' form is observed with an increase in the scan rate, and both anodic and cathodic peaks increase linearly and expand in opposite directions, implying that the NCM@PPy-C electrode material possesses the excellent rapid charge transfer and reversibility in the GCD tests.…”

Section: Electrochemical Performance Of Ncm@ppy-cmentioning

confidence: 99%

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Polypyrrole-Derived Carbon Coated NiCoMn Layered Double Hydroxides for High-Performance Supercapacitors

He,

Wang,

Lashari

et al. 2023

ACS Appl. Nano Mater.

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Supercapacitors are considered to be a kind of promising electronic device and energy storage system for the new generation of electric transportation, and they have received more and more attention for their advantages. In this work, a polypyrrole-derived carbon layer coated with NiCoMn layered double hydroxides (NCM-LDH) is directly anchored on a Ni foam by applying a facile hydrothermal technique combined with the moderate temperature carbonization treatment. Benefiting from the structural merits and multiple electro-active components, the as-prepared lamellar structured NF/NiCoMn-LDH@PPy-C (NCM@PPy-C for short) demonstrates an enhanced pseudocapacitive performance of about 3157.78 F g–1 at 1 A g–1. Meanwhile, its cyclic longevity is improved, and the cyclic efficiency reaches up to 90.57% after 10000 cycles at 20 A g–1. The development of a ternary hybrid can be explained by (i) multiple active sites, (ii) enhanced electron and ion transport, and (iii) structural stability. Moreover, coupled with the active carbon negative electrode, an assembled asymmetric supercapacitor, NF/NCM@PPy-C//AC, exhibits high energy densities and power densities (53.55 Wh kg–1@448.3 W kg–1 and 25.65 Wh kg–1@2715.88 W kg–1) with 1.8 V as the improved operating voltage, and awesome cycling life, retaining around 73% of its capacitance after 10000 cycles. This study presents an approach for creating electrode materials for supercapacitors using layered double hydroxides of transition metals.

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