Material experts annotated nine distinct categories from 75 research paper abstracts as training data for LLMs.The central node 'Material' in the knowledge graph is connected to nodes describing its nomenclature, composition, attributes, and application.Normalization process was employed to ensure uniform representation of entities and facilitate effective training of LLMs.The study focuses on energy materials, with 150,000 abstracts of peer-reviewed research articles in battery, solar cell, and catalyst fields.