Abstract: Provided are a composite material and a preparation method thereof, a negative electrode material, and a lithium ion battery. The negative electrode material includes at least one composite material, and the lithium ion battery includes at least one composite material. The composite material has a core-shell structure composed of an inner core and a hydrophobic coating layer, with the inner core including at least one lithium-containing silicon oxide, and the hydrophobic coating layer being used to cover the inner-core material.

Abstract: The present invention provides a foldable electric vehicle and a foldable vehicle frame thereof, wherein the foldable electric vehicle comprises a front frame adapted for being pivotally arranged on a vehicle body of a cycle, a back frame adapted for being pivotally arranged on a vehicle body of a cycle and an actuating arm arranged between the front frame and the back frame, wherein the actuating arm forms a front end and a rear end, wherein the front frame is pivotally arranged on the front end of the actuating arm, and the back frame is pivotally arranged on the rear end of the actuating arm.

Abstract: The present invention provides a foldable electric vehicle and a foldable vehicle frame thereof, wherein the foldable electric vehicle comprises a front frame adapted for being pivotally arranged on a vehicle body of a cycle, a back frame adapted for being pivotally arranged on a vehicle body of a cycle and an actuating arm arranged between the front frame and the back frame, wherein the actuating arm forms a front end and a rear end, wherein the front frame is pivotally arranged on the front end of the actuating arm, and the back frame is pivotally arranged on the rear end of the actuating arm.

Abstract: A golf bag vehicle includes a vehicle body and a driving wheel. The vehicle body includes an axle mounting on a lower portion thereof. The driving wheel includes a wheel frame, a motor and a wheel circle. The wheel frame detachably connects to the axle, and has an inner room. The motor mounts inside the inner room, for electrically connecting with a power supply. The wheel circle receives the wheel frame therein, and is rotatable with respect to the wheel frame. The wheel circle connects with the motor, and is driven by the motor, so that the driving wheel forms a self-driven structure.

Abstract: A golf bag vehicle includes a vehicle body and a driving wheel. The vehicle body includes an axle mounting on a lower portion thereof. The driving wheel includes a wheel frame, a motor and a wheel circle. The wheel frame detachably connects to the axle, and has an inner room. The motor mounts inside the inner room, for electrically connecting with a power supply. The wheel circle receives the wheel frame therein, and is rotatable with respect to the wheel frame. The wheel circle connects with the motor, and is driven by the motor, so that the driving wheel forms a self-driven structure.