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\begin{document}

\title{Morphology reconstruction of Nikel Cobalt layered double hydroxides
induced by electrolyte concentrations triggers high performance of
supercapacitive storage}



\author[1]{WenTao Lei}%
\author[2]{Shaobo Liu}%
\author[1]{Qi Liu}%
\author[3]{Xingjian Zou}%
\author[1]{Hui Xia}%
\affil[1]{Central South University}%
\affil[2]{Changsha University of Science and Technology}%
\affil[3]{Shenzhen MSU-BIT University}%


\vspace{-1em}



  
  \date{June 03, 2024}


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\begin{abstract}
Nikel Cobalt layered double hydroxides (NiCo LDHs) have emerged as ideal
electrode materials for supercapacitor due to their high specific
surface area and excellent cycling stability. Morphology control plays a
unique role in regulating the performance of NiCo LDHs, but there are
rare reports to regulate the morphology during energy storage. Herein,
the morphology of NiCo-LDHs electrode is optimized for enhancing energy
storage by simple activation process with different t concentrations of
the electrolyte. During the activation process, electrochemical
morphology reconstructed occurs on the electrode surface. With2 M KOH
electrolyte the NiCo-LDH electrode transforms from nanosheets to
nanoflower, which aids in reducing the distance of ion transport. The
reconstructed NiCo-LDH (NiCo-LDH-2) exhibits an ultra-high specific
capacitance of 5428 F g-1 at a current density of 1 A g-1, outperforming
most of NiCo LDHs. Even at a high current density of 10 A g-1, the
capacitance retention rate remains above 77.6\% after 1000
charge-discharge cycles. The strategy proposed in the study, which
involves concentration-controlled morphology optimization for energy
storage enhancement, holds great practical significance for the field of
supercapacitors.%
\end{abstract}%



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