Three-dimension hierarchical flower-like Ni1.5Co1.5O4 nanostructures composed of two-dimension ultrathin nanosheets as an anode material for lithium ion batteries

• Ni1.5Co1.5O4 microflower is synthesized on a large scale by a simple method.
• As-prepared Ni1.5Co1.5O4 is composed of two-dimension ultrathin nanosheets.
• Ni1.5Co1.5O4 electrode exhibits specific capacity of 980.8 mAh g−1 after 30 cycles.
• Ni1.5Co1.5O4 microflowers show potential application for lithium ion batteries.

Uniform three-dimension hierarchical flower-like Ni1.5Co1.5O4 nanostructures were synthesized on a large scale by a simple, low-temperature hydrothermal method without any template, catalyst and surfactant, followed by a calcinating process. The obtained Ni1.5Co1.5O4 products were composed of two-dimension ultrathin nanosheets with random attachment. Nitrogen sorption isotherm shows that this structure possesses a high specific surface area of 118.8 m2 g−1 with an average pore diameter of 16.67 nm. When tested as an anode material, the as-prepared Ni1.5Co1.5O4 nanostructures exhibit an initial discharge capacity of 1461.5 mAh g−1. After 30 cycles at the current density of 100 mA g−1, the discharge capacity still keeps 980.8 mAh g−1. The obtained three-dimension hierarchical flower-like Ni1.5Co1.5O4 nanostructures show a promising anode material for lithium ion batteries.

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