MOF derived pomegranate-like NiSb/C composites for Li-ion batteries

To address the need for higher energy density in lithium-ion batteries, alternative alloy-based anode materials have been explored to replace graphite which has limited capacity. However, these alloy anodes face challenges related to poor electrochemical performance due to volume expansion. To overcome this, various strategies like nanostructuring, introducing conductive phases, and constructing hollow-structured, have been investigated. Herein, a pomegranate-like NiSb/C composite was fabricated via a liquid-phase displacement reaction between SbCl3 and Ni/C derived from Ni-based MOF precursor. The resulting composite demonstrates stable reversible capacity and rate performance within a controlled voltage range. The performance mechanisms were analyzed through electrochemical impedance spectroscopy and distribution of relaxation times analysis.