Journal
NANOMATERIALS
Volume 6, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/nano6110218
Keywords
Ni2GeO4; porous nanosheets; Ni foam; Li-ion batteries; Self-standing
Categories
Funding
- NSFC China [51575016]
- Beijing Oversea High-Level Talent Project
- Beijing Natural Science Foundation [KZ20141000500]
- post-doctoral research grant of Beijing [Q6101013201501]
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A strategy for growth of porous Ni2GeO4 nanosheets on conductive nickel (Ni) foam with robust adhesion as a high-performance electrode for Li-ion batteries is proposed and realized, through a facile two-step method. It involves the low temperature hydro-thermal synthesis of bimetallic (Ni, Ge) hydroxide nanosheets precursor on Ni foam substrates and subsequent thermal transformation to porous Ni2GeO4 nanosheets. The as-prepared Ni2GeO4 nanosheets possess many interparticle mesopores with a size range from 5 to 15 nm. The hierarchical structure of porous Ni2GeO4 nanosheets supported by Ni foam promises fast electron and ion transport, large electroactive surface area, and excellent structural stability. The efficacy of the specially designed structure is demonstrated by the superior electrochemical performance of the generated Ni2GeO4 nanosheets including a high capacity of 1.8 m.A.hcm(-2) at a current density of 50 mu Acm(-2), good cycle stability, and high power capability at room temperature. Because of simple conditions, this fabrication strategy may be easily extended to other mixed metal oxides (MxGeOy).
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