2results about How to "Rich in elements" patented technology

The present application relates to lithium ion battery cathode material preparation technical field, and is a kind of preparation method of nitrogen-phosphorus-potassium co-doped carbon-coated lithium-rich lithium iron phosphate cathode material, comprising the following steps: cocoa powder is added dropwise with acetic acid solution, after reaction, dropwise add hydrogen peroxide, add lithium hydroxide, and the pH of mixed solution is controlled by the amount of deionized water added;After adding deionized water and carbon-coated lithium iron phosphate precursor, stir evenly, vacuum freeze-drying is carried out, and the product is obtained after sintering treatment of dry product in inert atmosphere.Cocoa powder resource is renewable, environment-friendly, and can provide rich nitrogen, phosphorus and potassium elements to complete the doping modification of carbon-coated lithium iron phosphate.The present application provides an environmentally friendly, clean and simple cathode material modification and synthesis idea, and the prepared cathode material has good rate performance and capacity performance.

This invention relates to the field of intelligent office work, and discloses an office assistance method, device, equipment, and medium, comprising: receiving an office task in natural language form input by a task initiator; using a large model to perform intent recognition and key information extraction on the office task in natural language form, obtaining intent recognition results and key information; generating task requirements based on the intent recognition results and key information; and sending the task requirements to the task executor. This solves the problem in the prior art where misunderstandings of office tasks lead to employee errors and low office efficiency.