期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 24, 期 7, 页码 1651-1656出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201704416
关键词
electrochemistry; energy storage; metal-organic frameworks; template synthesis; transition metals
资金
- 973 Program [2013CB834704]
- Provincial Key Project of China [7131253]
- National Natural Science Foundation of China [21471018, 21404010, 21201018, 21490570]
- 1000 Plan (Youth)
Transition-metal oxides are one of the most promising anode materials for energy storage in lithium- and sodium-ion batteries (LIBs and NIBs, respectively). To improve the electrochemical performance of metal oxides (e.g., Co3O4), such as capacity and cyclability, a convenient strategy (with a metal-organic framework as a template) is introduced to generate Zn- or Ni-doped Co3O4. The obtained hollow core-shell nanosized Co3O4 (denoted as Zn/Ni-Co-Oxide) derived from pyrolyzing zinc or nickel co-doped ZIF-67 (Co(mIm)(2); mIm=methylimidazole) shows a drastically enhanced capacity of 1300 mAhg(-1) at a high current density of 5000 mAg(-1), compared with that of pristine cobalt oxide (800 mAhg(-1)) in LIBs. A zinc-doped Zn-Co-Oxide demonstrates a stable capacity of 1600 mAhg(-1) at 1000 mAg(-1) for 700 cycles and an excellent performance in full coin cells (cycled with LiNi0.5Co0.3Mn0.2O2). Moreover, NIB tests show a stable capacity of 300 mAhg(-1) for more than 250 cycles.
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