Details

Autor(en) / Beteiligte

• Cao, Xian-Wen
• Xu, Yu-Ting
• Yang, Bo
• Lang, Hong-Zhi
• Shen, Ze-Xiang
• Wang, Ning
• Wang, Xiao-Feng
• Wang, Sheng-Han
• Sun, Cheng-Lin

Titel

In-situ Co-precipitated α-MnO2@2-methylimidazole cathode material for high performance zinc ion batteries

Ist Teil von

• Journal of alloys and compounds, 2022-03, Vol.896, p.162785, Article 162785

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Zinc ion batteries (ZIBs) are newly emerging and widely attracted energy storage devices owing to its advantages of intrinsic safety and low-cost effectiveness. Herein, we reported a nanorod-like MnO2 cathode material composited with carbon and pyrrolic nitrogen by in-situ co-precipitation method at room temperature, which was used as ZIB cathode to deliver a high specific capacity of 339 mAh g−1 at 100 mA g−1 and a long cycle stability over 2000 cycles at 1000 mA g−1, resulting in the ultrahigh coulombic efficiencies approximate to 100%. The improved performance was attributed to the enhancement of structural stability and more zinc ion insertion sites after introducing the 2-methylimidazole (2-MI) coating layer. The phase transition of α-MnO2 @2-methylimidazole (α-MnO2 @2-MI) and the formation of more porous architecture could be the origin of the continuous capacity increasing in the initial several cycles, which was proved by the results of the ex-situ x-ray diffraction (XRD) and the scanning electronic microscope (SEM). This method can be a more realistic choice for the further commercial applications of low-cost and easily-accessed ZIBs with excellent electrochemical performance.