Facile synthesis of Co3O4 nanocrystals with superior lithium storage properties from bis (8–hydroxyquinoline) cobalt complex as anode materials for lithium–ion batteries

Wrapping Porous Hierarchical Co3O4 Nanospheres within Reduced Graphene Oxide Nanosheets for High-Performance Lithium Storage

“…Though a high capacity of 1500 mA h g −1 was reached in the initial stage, the Co 3 O 4 electrode suffered from the fast capacity fading in the following 100 cycles, merely maintaining 580 mA h g −1 after 500 cycles. 14 Chen et al demonstrated that heteroatom doping could boost electrochemical performance of Co 3 O 4 -based materials. 18 High-concentration P/S-doped Co 3 O 4 was fabricated with plasma treatment and subsequent phosphating or vulcanization.…”

“…Lithium-ion batteries (LIBs) have been widely used in the energy storage field over past decades; however, the state-of-the-art anode material, graphite, displays a limited theoretical capacity of 372 mA h g –1 , and the potential Li dendrite induced safety issue. − Thus, it is still critical to develop new anode materials with high theoretical capacity and distinctive architecture. Transition metal oxides (TMOs) are promising LIB anode materials owing to their high theoretical capacities and abundant resources. − Among various TMOs, spinel Co 3 O 4 can deliver a theoretical capacity of 890 mA h g –1 via conversion reaction (Co 3 O 4 + 8Li + + 8e – ↔ 3Co + 4Li 2 O). − More importantly, the lithiation potential of Co 3 O 4 is around 1 V (vs Li/Li + ), which can avoid the lithium dendrite formation . Nevertheless, Co 3 O 4 also suffers from low electron conductivity and large volume variation, which leads to low-rate capability and fast capacity fading upon cycling. − …”

“…10−13 More importantly, the lithiation potential of Co 3 O 4 is around 1 V (vs Li/Li + ), which can avoid the lithium dendrite formation. 14 Nevertheless, Co 3 O 4 also suffers from low electron conductivity and large volume variation, which leads to low-rate capability and fast capacity fading upon cycling. 15−17 Recently, many strategies have been developed to address the aforementioned issues.…”

“…Zhao et al fabricated Co 3 O 4 nanocrystals through a facile pyrolysis process of bis (8-hydroxyquinoline) cobalt complex. Though a high capacity of 1500 mA h g –1 was reached in the initial stage, the Co 3 O 4 electrode suffered from the fast capacity fading in the following 100 cycles, merely maintaining 580 mA h g –1 after 500 cycles . Chen et al demonstrated that heteroatom doping could boost electrochemical performance of Co 3 O 4 -based materials .…”