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Cited by 8 publications
(4 citation statements)
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References 22 publications
(31 reference statements)
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“…For example, the influence of cobalt doping on the electrochemical properties of layered manganese oxide has been studied to improve the cycle performance of lithium-ion batteries. The doping of different elements into redox-active nanosheets and its effect on the crystal structure, optical properties, and redox properties have been scarcely examined, although such properties would be largely modified. Examples of redox-active nanosheets doped with different elements include MnO 2 nanosheets partly substituted with Co, Co/Ni, or Ru . However, the redox properties have been examined only for Ru-substituted MnO 2 nanosheets.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…For example, the influence of cobalt doping on the electrochemical properties of layered manganese oxide has been studied to improve the cycle performance of lithium-ion batteries. The doping of different elements into redox-active nanosheets and its effect on the crystal structure, optical properties, and redox properties have been scarcely examined, although such properties would be largely modified. Examples of redox-active nanosheets doped with different elements include MnO 2 nanosheets partly substituted with Co, Co/Ni, or Ru . However, the redox properties have been examined only for Ru-substituted MnO 2 nanosheets.…”
Section: Introductionmentioning
confidence: 99%
“…The starting material was synthesized by following the reported procedure. Although protonation of the starting material has been studied, the influence of the doping amount on the crystal structure and the valence of constituent elements has not been reported . Although the synthesis of MnO 2 nanosheets doped with cobalt has been examined via a bottom-up process, there is no direct evidence for the doping of Co into the lattice of MnO 2 nanosheets. In addition, the structural aspects and electrochemical properties have not been studied.…”
Section: Introductionmentioning
confidence: 99%
“…2),21), 22) In this study, we prepared novel redoxable nanosheets of Mn Ni oxide as the stage prior to the NiCoMn oxide nanosheets. Dahn and co-workers have reported the preparation of layered Na 2/3 (Mn 2/3 Ni 1/3 )O 2 , where Mn and Ni are in tetravalent and divalent state respectively.…”
Section: )3)mentioning
confidence: 99%
“…On the other hand, framework doping of Co or Ni ion into aqueous electrode materials, birnessite in particular, is not trivial. Incorporating Co or Ni ions into the interlayer region (between [MnO 6 ] octahedral layers) by ion exchange has been widely reported. However, few studies have presented convincing spectroscopic evidence to demonstrate the framework doping of guest cations into the [MnO 6 ] octahedra (the intralayer region). For example, our recent X-ray and neutron scattering analyses showed that Co ions were unable to form a framework doped (Co)­MnO 2 birnessite prepared using a wet chemistry method, and biphase materials containing Co x Mn 3– x O 4 spinel and MnO 2 birnessite were formed instead . Notably, birnessite materials with various metal ions doped in the interlayer region may act as good precursors to form different tunnel-structure materials via high temperature annealing, , while its electrical conductivity and charge storage capacity can be significantly improved if the dopants are incorporated within the framework of [MnO 6 ] octahedra. Here, we report a room-temperature wet chemistry method for synthesizing (Ni)­MnO 2 layered birnessite material using MnCl 2 and Ni­(C 5 H 7 O 2 ) 2 precursors.…”
Section: Introductionmentioning
confidence: 99%