Peking University

Ccteg China Coal Research Institute

Biao Li

Qingyong Meng

Chenxin Li

Liang Wen

Kebing Wang

Jin Bo Ma

Wenzhen Wu

Liya Zhang

Yuan Fu

Zefang Li

Chunxian Wei

Xiaodi Jia

Yingxi Li

Dingguo Xia

Wanbo Dai

Guowei Yang

Dashan Yang

Jin Ma

The disclosure presents a mining converged communication system. The system includes a first converged communication device and a plurality of service devices. The first converged communication device is configured to receive a first data packet from a first service device that initiates a service request in the plurality of service devices, determine a first target service device that receives the service request in the plurality of service devices, based on the first data packet, and send the first data packet to the first target service device. The first service device in the plurality of service devices includes any service device set on or under a mine, and the first target service device includes at least one service device set on and/or under the mine.

Mining converged communication system and communication method

The present application discloses boron-doped lithium rich manganese based materials for cathodes of lithium ion batteries. The disclosed cathode materials can be prepared by co-precipitation and sol-gel methods. The chemical formula of this cathode material is Li[LiMnCoNiB]O(a+b+c+d+x=1, a, b, x&#x3e;0, c&#x2267;0, d&#x2267;0, c+d&#x3e;0). Lithium ion batteries using these cathode materials show impressive improvements in performance and increased tap density at low level of boron doping. The co-precipitation method is particularly suitable for large-scale industrial production. The sol-gel method is simple and can produce fine and uniform particles.

Boron-doped lithium-rich manganese based materials and preparation methods for Li-ion battery cathode

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Beijing, China

Biao Li