杨建芬 is associated with the preparation of a sodium-based modified phenolic resin hard carbon negative electrode. Further details about their professional background are not available in the provided sources, but they are involved in research related to sodium-ion battery materials, particularly focusing on the modification of phenolic resins for hard carbon electrodes in sodium-ion batteries (SIBs). Their work is documented in patent databases such as Espacenet under the patent title 'Preparation Method For Sodium-Based Modified Phenolic Resin Hard Carbon Negative Electrode'. The patent focuses on advanced materials for battery technology, indicating expertise in materials science and electrochemistry.