Abstract: Provided are an olivine-type cathode material, a method thereof, and a lithium-ion battery. The cathode material includes a matrix and a carbon coating layer. In a Raman spectrum, the cathode material has Raman responses in wavenumber regions of 940 cm?1 to 950 cm?1, 1330 cm?1 to 1350 cm?1, and 1580 cm?1 to 1610 cm?1, corresponding to three characteristic peaks A, B, and C, respectively. The cathode material satisfies: 0.01?an average of [I(A)/I(C)]?0.3 and 0.01?an average of [I(A)/I(B)]?0.3. The cathode material according to the present disclosure has a uniform carbon coating, and thus the cathode material has a high stability, a low specific surface area, a low volume resistivity, and a high pallet density. At the same time, when the cathode material is applied in a lithium-ion battery, the lithium-ion battery has excellent electrochemical performances.

Abstract: A three-stage degassing and dewatering device includes a first-stage degasser, a second-stage degasser, an oil drainer, a rod electrode, a dewaterer, and a water drainer. The first-stage degasser implements a first-stage axial-flow type collision buffer degassing and dewatering operation, forming a first-stage crude oil after removing some of the gas and water in the gas-containing and water-containing crude oil. The second-stage degasser implements a second-stage elevated efficient degassing operation, forming a second-stage crude oil after removing the remaining gas in the first-stage crude oil. The rod electrode constructs a dynamic electric field with a high frequency and a high voltage, and implements a third-stage high-frequency and high-voltage rapid dewatering operation together with the dewaterer, forming a qualified crude oil after removing the remaining water in the crude oil emulsion.

Abstract: The three-stage degassing and dewatering technology with vertical, horizontal and elevated T-shaped tubes combined as well as a high-frequency and high-voltage dynamic electric field dewatering technology with a mouse cage formation constructed by rod electrodes are adopted. The first-stage degasser implements a first-stage axial-flow type collision buffer degassing and dewatering operation, forming a first-stage crude oil after removing some of the gas and water in the gas-containing and water-containing crude oil. The second-stage degasser implements a second-stage elevated efficient degassing operation, forming a second-stage crude oil after removing the remaining gas in the first-stage crude oil. The rod electrode constructs a dynamic electric field with a high frequency and a high voltage, and implements a third-stage high-frequency and high-voltage rapid dewatering operation together with the elevated dewaterer, forming a qualified crude oil after removing the remaining water in the crude oil emulsion.