▎ 摘　　要

NOVELTY - Preparing cobalt(II) carbonate/reduced graphene oxide composite material comprises e.g. (1) start three advection pumps at the same time, graphene oxide dispersion and cobalt (II) ion shape control agent solution are outputted by the first advection pump and the second advection pump respectively, and mixing in first stage T-shaped micro three-way and hit at high speed to form a uniform mixture, (2) the uniform mixture flowing out of the third interface of the first-stage T-type micro-tee and mixing ammonium carbonate solution output by the third advection pump in second-stage T-type micro-tee and collided at high speed to produce liquid phase co-precipitation reaction to generate a precursor mixture, (3) pouring precursor mixture into polytetrafluoroethylene reactor for hydrothermal reaction, (4) after completing reaction, centrifuging, washing, and freeze drying to obtain cobalt(II) carbonate/reduced graphene oxide composite material. USE - The preparing cobalt(II) carbonate/reduced graphene oxide composite material is useful in lithium ion battery electrode (claimed). ADVANTAGE - The material: has good cycle performance and rate performance. DETAILED DESCRIPTION - Preparing cobalt(II) carbonate/reduced graphene oxide composite material comprises (1) start three advection pumps at the same time, graphene oxide dispersion and cobalt (II) ion shape control agent solution are outputted by the first advection pump and the second advection pump respectively, and mixing in first stage T-shaped micro three-way and hit at high speed to form a uniform mixture, (2) the uniform mixture flowing out of the third interface of the first-stage T-type micro-tee and mixing ammonium carbonate solution output by the third advection pump in second-stage T-type micro-tee and collided at high speed to produce liquid phase co-precipitation reaction to generate a precursor mixture, (3) pouring precursor mixture into polytetrafluoroethylene reactor for hydrothermal reaction, (4) after completing reaction, centrifuging, washing, and freeze drying to obtain cobalt(II) carbonate/reduced graphene oxide composite material. The process is carried out in a two-stage micro-impinging stream reactor, the two-stage micro-impinging stream reactor includes three advection pumps, two T-shaped micro three-way joints, and capillary tubes for pipe connection. The two advection pumps are respectively marked as the first advection pump, the second advection pump and the third advection pump. The two T-shaped micro three-way joints are respectively marked as the first-stage T-type micro-tees and the second-stage T-type Micro-tees, the outlet ends of the first advection pump and the second advection pump are connected to two of the first-stage T-shaped micro-tees through capillary tubes, and the remaining third port of the first-stage T-shaped micro-tees The outlet end of the third advection pump is connected to two ports of the second-stage T-type micro-tees through capillary tubes. The remaining third ports of the second-stage T-type micro-tees are no longer connected to capillary tubes, thus forming an outlet suddenly enlarged T-shaped reaction chamber. An INDEPENDENT CLAIM is also included for cobalt(II) carbonate/reduced graphene oxide composite material.