Jiangsu Daoying Technology Co., Ltd.

General Machinery Plant of Liaohe Petroleum Exploration Bureau of Cnpc

Xiaohui Zhang

Ji Chen

Yi Wang

Zhenyu Xu

Yaoqing Pan

Zhenyu Jia

Wei Zhang

Xueying Zheng

Yongning Wu

Siming Yang

Honghe Zheng

Jinli Zhu

The present invention discloses a micro-capsule type silicon-carbon composite negative electrode material, and the negative electrode material comprises a current collector and a silicon-carbon coating layer formed by drying silicon-carbon paste coating the current collector; the silicon-carbon slurry comprises a carbonaceous paste and silicon capsule powder dispersed in the carbonaceous paste; the carbonaceous paste comprises a dispersing agent, and a carbon material, a first conductive agent and a first binder dispersed in the dispersing agent; the silicon capsule powder has micro-capsule structures comprising silicon powder and a second binder coating the surface of the silicon powder and in which the silicon powder is a core and the second binder is an outer shell; and the first binder is different from the second binder. The improved silicon-carbon composite negative electrode material of the present disclosure has excellent effects in cycle performance, coulombic efficiency and rate capability.

Micro-capsule type silicon-carbon composite negative electrode material and preparing method and use thereof

The present invention relates to a pre-stressed insulated tubing, including an inner tube () and an outer tube () nested outside of the inner tube (), and a closed ring cavity is formed between the inner tube () and the outer tube (), wherein an insulated casing () is arranged in the closed ring cavity. The pre-stressed insulated tubing of the present invention features high vacuum degree, high thermal insulation level and long working life, and the insulated casing is reusable for cost saving.

Pre-sressed insulated tubing

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Jiangsu, China

Xiaohui Zhang