Revealing the mechanism of Faradaic PN junction design strategy in enhancing electrochemical performance of supercapacitor

Chen, Rongxin; Cai, Xiaoyi; He, Xinyu; Zhang, Tengyi; Eldona, Calvin; Zhang, Qi; Cheng, Li; Shen, Ze Xiang

doi:10.1016/j.cej.2024.150981

Chemical Engineering Journal

2024

DOI: 10.1016/j.cej.2024.150981

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Revealing the mechanism of Faradaic PN junction design strategy in enhancing electrochemical performance of supercapacitor

Rongxin Chen,

Xiaoyi Cai,

Xinyu He

et al.

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Cited by 9 publications

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Rational Construction of Heterostructures with n‐Type Anti‐Barrier Layer for Enhanced Electrochemical Energy Storage

Chen,

Cheng,

Dai

et al. 2024

Advanced Energy Materials

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As a type of 2D materials, layered double hydroxides (LDHs) have emerged as potential candidates for electrochemical energy storage materials. To address their challenges of limited active sites and sluggish charge transfer kinetics, etc., this work presents an ingenious synchronous topochemical pathway (STP) method that enables the in situ anchoring of numerous nanosized Co9S8 on the rigid layers of LDHs. These n‐type anti‐barrier layers, generated by the ohmic contact between a quasi‐metal (Co9S8) and n‐type semiconductor (LDHs), alter the energy band structure and electron states near the Fermi level, optimizing the intrinsic conductivity and deprotonation reaction barriers of LDH materials. The prepared NiCoAl‐LDHs@Co9S8 (LCS) electrode exhibits remarkable electrochemical capacity (473.2 mAh g−¹ at 1 A g−¹) and operational stability (91.2% capacity retention after 20,000 cycles). Furthermore, an aqueous battery device constructed with LCS cathode and Fe‐Ni sulfide (FNS) anode demonstrates an impressive energy density of 118.5 Wh kg−¹ at a power density of 800 W kg−¹. This generalized structural design strategy achieves multiple enhancements in active sites, charge transfer efficiency, and structural stability of LDH materials, providing insights into the potential relationships between energy band and electrochemical performance in energy storage materials.

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Rational Construction of Heterostructures with n‐Type Anti‐Barrier Layer for Enhanced Electrochemical Energy Storage

Chen,

Cheng,

Dai

et al. 2024

Advanced Energy Materials

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Interface structure of PN junctions in NiO–WO3–FTO photoelectrode for efficient DSSCs and enhanced photoresponses

Sun,

Lin,

Okumura

et al. 2024

Chemical Engineering Journal

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Photo-assisted charging of heterostructured NiCo2S4@NiCo-LDH composite electrode with remarkable photoelectronic memory effect for high-performance asymmetric supercapacitor

Dong,

Zhang,

Shu

et al. 2024

Energy Conversion and Management

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Revealing the mechanism of Faradaic PN junction design strategy in enhancing electrochemical performance of supercapacitor

Cited by 9 publications

References 50 publications

Rational Construction of Heterostructures with n‐Type Anti‐Barrier Layer for Enhanced Electrochemical Energy Storage

Rational Construction of Heterostructures with n‐Type Anti‐Barrier Layer for Enhanced Electrochemical Energy Storage

Interface structure of PN junctions in NiO–WO3–FTO photoelectrode for efficient DSSCs and enhanced photoresponses

Photo-assisted charging of heterostructured NiCo2S4@NiCo-LDH composite electrode with remarkable photoelectronic memory effect for high-performance asymmetric supercapacitor

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