Nanocone-arrays supported tin-based anode materials for lithium-ion battery

The electrodeposited nickel nanocone-arrays without any template are introduced to Sn-based anode materials as current collector for lithium ion battery. Nickel nanocone-arrays are tightly wedged in the electrodeposited Sn film, and thereby enhance the interfacial strength between active materials and substrate. Furthermore, annealing is conducted to form Sn–Ni alloy, in which Ni renders an inactive matrix to buffer volume change during cyclic lithiation/delithiation. The nanocone-arrays supported Sn–Ni alloy anode shows satisfactory Li+ storage properties with the first reversible capacity of 807 mAh g−1. The charge capacity for the 50th cycle is 678 mAh g−1, delivering good retention rate of 99.6% per cycle. These improved performances of nickel nanocone-arrays supported Sn–Ni alloy anodes indicate the potential of their application as electrode materials for high performance energy storage.

► Nickel nanocone-arrays supported Sn-based electrodes were investigated for the first time. ► The reversible capacity for the 70th cycle was 614 mAh g−1 with superior retention of 99.6% per cycle. ► The nanocone-arrays buffered the volume variation and enhanced the adhesion strength between the active materials and current collectors. ► This approach was general and facile to be exploited for other active materials to achieve a high-capacity and durable electrode.