Patent Bibliometric Analysis of Lithium Air Battery Industry

Lithium air battery is a new kind of green high-energy batteries with the advantages of high energy density, light weight, good security, environment friendly and others. This study examines the inventive activities in lithium air battery industry using the patent information as published by the Innography patent platform. Statistics data are analyzed based on the view of technological development trend, geographical distribution, and innovative organizations. It is observed that although the lithium air battery technology is a newly emerging technology, patent counts have been increasing fast in recent years. Through source jurisdiction and inventor address analysis, it is found that China, Japan, U.S. and Korea are main technological application countries, and important inventors also belong to these countries except for the different rank. The major innovative organizations include Samsung Electronics, Toyota Motor, Solvay S.A., Polyplus Co., Robert Bosch GmbH, etc. According to text clustering analysis of patent contents, it is found that lithium air battery technology is centralized in six main technology fields: Air Electrode, Preparation Methods, Lithium Ion, Carbon Material and Secondary Battery. Finally, core patents are found through patent strength analysis.