TY - JOUR
T1 - Synthesis, structure, and electrochemical properties of some cobalt oxalates
AU - Cai, Jinghua
AU - Lan, Yuanqi
AU - He, Haiyan
AU - Zhang, Xinyuan
AU - Armstrong, A. Robert
AU - Yao, Wenjiao
AU - Lightfoot, Philip
AU - Tang, Yongbing
N1 - W.Y. thanks the Royal Society for the award of a Newton International Fellowship (140881). The authors gratefully acknowledge financial support from the Key-Area Research and Development Program of Guangdong Province (2019B090914003), the National Natural Science Foundation of China (51702232, 51822210, 51972329, 22005329), the Shenzhen Science and Technology Planning Project (JCYJ20190807172001755, JCYJ20180507182512042), the SIAT Innovation Program for Excellent Young Researchers (201811), and the Science and Technology Planning Project of Guangdong Province (2019A1515110975, 2019A1515011902).
PY - 2020/11/16
Y1 - 2020/11/16
N2 - Transition-metal oxalates have wide applications in magnetics,
photoemission, electrochemistry, etc. Herein, using hydrothermal
reactions, five cobalt(II) oxalates, Na2Co2(C2O4)3·2H2O (I), Na2Co(C2O4)2·8H2O (II), KLi3Co(C2O4)3 (III), Li4Co(C2O4)3 (IV), and (NH4)2Co2(C2O4)F4 (V)
have been synthesized, and their structures are determined from
single-crystal X-ray diffraction or Rietveld refinement of powder X-ray
diffraction data. Notably, IV and V are
identified for the first time. The structures of these cobalt oxalates
are versatile, covering 0D, 1D, 2D, and 3D frameworks, while the
coordination environments of Co2+ centers are uniquely distorted octahedra. As representative examples, I and III
are investigated as cathode materials for secondary batteries. Both
exhibited electrochemical activity despite large cell polarization. The
present study enriches the transition-metal oxalate family and provides
new options for energy storage materials.
AB - Transition-metal oxalates have wide applications in magnetics,
photoemission, electrochemistry, etc. Herein, using hydrothermal
reactions, five cobalt(II) oxalates, Na2Co2(C2O4)3·2H2O (I), Na2Co(C2O4)2·8H2O (II), KLi3Co(C2O4)3 (III), Li4Co(C2O4)3 (IV), and (NH4)2Co2(C2O4)F4 (V)
have been synthesized, and their structures are determined from
single-crystal X-ray diffraction or Rietveld refinement of powder X-ray
diffraction data. Notably, IV and V are
identified for the first time. The structures of these cobalt oxalates
are versatile, covering 0D, 1D, 2D, and 3D frameworks, while the
coordination environments of Co2+ centers are uniquely distorted octahedra. As representative examples, I and III
are investigated as cathode materials for secondary batteries. Both
exhibited electrochemical activity despite large cell polarization. The
present study enriches the transition-metal oxalate family and provides
new options for energy storage materials.
U2 - 10.1021/acs.inorgchem.0c02014
DO - 10.1021/acs.inorgchem.0c02014
M3 - Article
AN - SCOPUS:85096580106
SN - 0020-1669
VL - Articles ASAP
JO - Inorganic Chemistry
JF - Inorganic Chemistry
ER -