A novel cobalt chloride hydrate modified Co-MOF derived carbon microspheres as anode materials for lithium ion batteries

In this work, the carbon-microsphere loaded with cobalt chloride hydrate (CCH@CM) was prepared via a collaborative and chlorination strategy derived from ZIF-67 precursor, which exhibits a superior electrochemical performance as a lithium-ion battery anode material. The synthesized CCH@CM obtained a high initial discharge capacity (947 mAh g(-1)) and the capacity attenuation rate is close to zero after 200 cycles at the current density of 100 mA g(-1). The porous structure derived from ZIF-67 not only can provide a conductive path, which increases the transport of electrons and lithium ions, but also alleviate volume expansion. The presences of-Cl-/H2O groups provide active sites for the anchoring of Li+. As the first successful synthesizing the cobalt chloride hydrate (CCH) from ZIF-67, good electrochemical performance provides a promising for the large-scale application in lithium ion batteries.

Automated summary

In this work, carbon-microsphere loaded with cobalt chloride hydrate (CCH@CM) was synthesized from ZIF-67 precursor using a collaborative and chlorination strategy. The resulting CCH@CM demonstrated superior electrochemical performance as a lithium-ion battery anode material, with high initial discharge capacity and minimal capacity attenuation rate. The porous structure derived from ZIF-67 provided a conductive path and alleviated volume expansion, while the presence of -Cl- / H2O groups offered active sites for the anchoring of Li+. The successful synthesis of CCH from ZIF-67 holds promise for large-scale applications in lithium-ion batteries.