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Peer-reviewedCC BYRSC advances

β-FeOOH mediated heavy indium doping to release the tunnel space in α-MnO₂.

  • Hongmei Zhao1
  • Song Li1
  • Jing Wang1
  • Wai-Yeung Wong2
  • Pengfei Liu3
  • Jing Li1
  • Junjie He1
  1. 1Department of Science and Technology, Yunnan Agricultural University Kunming 650201 China [email protected] [email protected].
  2. 2Department of Applied Biology and Chemical Technology, Research Institute for Smart Energy, The Hong Kong Polytechnic University Hung Hom Hong Kong China [email protected].
  3. 3Spallation Neutron Source Science Center, Institute of High Energy Physics, Chinese Academy of Sciences Dongguan 523803 China.
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Abstract

Alpha manganese dioxide (α-MnO2) has shown promising applications in energy storage, electrocatalysis, ion adsorption/separation due to its unique tunnel structure. In the preparation of α-MnO2, the potassium ion template is important for inducing the formation of the tunnels, but it leaves a large amount of potassium ions inside the final α-MnO2 tunnel because of the strong interaction between potassium ion and the inner wall of MnO2 tunnels. The potassium ion not only occupies and wastes the space of the tunnel, but also hinders the transport of the ions in the tunnels. Here, with the assistance of iron, indium is introduced into α-MnO2. The ICP-MS results confirmed that only 0.31% of In ions is doped in α-MnO2 without Fe and the content of In is significantly increased to 0.81% when Fe is added as an auxiliary species. Theoretical calculation reveals the binding energy between Fe-In co-doped α-MnO2 and potassium ions is significantly decreased. Moreover, the conductivity is increased from 0.177 µS cm-1 to 1.55 µS cm-1. Based on these improvements, the FeInMnO2 cathode was fabricated and presented excellent charge storage performance in zinc ion battery.

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Cite

BibTeXRIS
BibTeX
@article{zhao2026βfeooh,
  title = {{β-FeOOH mediated heavy indium doping to release the tunnel space in α-MnO₂.}},
  author = {Hongmei Zhao and Song Li and Jing Wang and Wai-Yeung Wong and Pengfei Liu and Jing Li and Junjie He},
  journal = {RSC advances},
  year = {2026},
  month = nov,
  doi = {10.1039/d6ra07481b},
  url = {https://europepmc.org/article/MED/42997250},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - β-FeOOH mediated heavy indium doping to release the tunnel space in α-MnO₂.
AU  - Hongmei Zhao
AU  - Song Li
AU  - Jing Wang
AU  - Wai-Yeung Wong
AU  - Pengfei Liu
AU  - Jing Li
AU  - Junjie He
PY  - 2026
DA  - 2026/11/06
JO  - RSC advances
DO  - 10.1039/d6ra07481b
UR  - https://europepmc.org/article/MED/42997250
AB  - Alpha manganese dioxide (α-MnO2) has shown promising applications in energy storage, electrocatalysis, ion adsorption/separation due to its unique tunnel structure. In the preparation of α-MnO2, the potassium ion template is important for inducing the formation of the tunnels, but it leaves a large amount of potassium ions inside the final α-MnO2 tunnel because of the strong interaction between potassium ion and the inner wall of MnO2 tunnels. The potassium ion not only occupies and wastes the space of the tunnel, but also hinders the transport of the ions in the tunnels. Here, with the assistance of iron, indium is introduced into α-MnO2. The ICP-MS results confirmed that only 0.31% of In ions is doped in α-MnO2 without Fe and the content of In is significantly increased to 0.81% when Fe is added as an auxiliary species. Theoretical calculation reveals the binding energy between Fe-In co-doped α-MnO2 and potassium ions is significantly decreased. Moreover, the conductivity is increased from 0.177 µS cm-1 to 1.55 µS cm-1. Based on these improvements, the FeInMnO2 cathode was fabricated and presented excellent charge storage performance in zinc ion battery.
SN  - 2046-2069
ER  -