# Erick Espinosa-Villatoro, Ph.D. – Cal.com booking page > Battery Materials Consultant | SSRL & SLAC Research Affiliate** I help companies, startups, and research organizations solve complex battery materials challenges through advanced characterization, failure analysis, and degradation studies. My expertise includes lithium-ion and next-generation batteries, with a focus on Ni-rich cathodes, lithium-metal and silicon anodes, interphase chemistry (SEI/CEI), transition-metal crossover, and cell aging mechanisms. I combine synchrotron-based techniques, mass spectrometry, and electrochemical diagnostics to provide actionable insights for R&D and product development. In addition to my research affiliations with the Stanford Synchrotron Radiation Lightsource (SSRL) and the SLAC-Stanford Battery Center, I serve as a consultant for EXUM Instruments, supporting applications of LALI-TOF-MS for battery materials analysis and spatially resolved chemical characterization. Book a short introductory call if you would like to discuss: Battery failure analysis and degradation mechanisms LALI-TOF-MS applications and data interpretation Advanced materials characterization strategies Battery R&D challenges and experimental design Industry-academic collaborations Technical due diligence and expert reviews I look forward to learning about your project and exploring how I can help. Booking page: https://cal.com/erick-leo-ev ## Event types - [60 min](https://cal.com/erick-leo-ev/discussion-erick-ev): 60 min, confirmed instantly, event type id 7194132. 60 minutes call with Erick. Details: https://cal.com/erick-leo-ev/discussion-erick-ev.md - [30 min](https://cal.com/erick-leo-ev/30min): 30 min, confirmed instantly, event type id 7173298. 30 minutes call with Erick Details: https://cal.com/erick-leo-ev/30min.md - [15 min](https://cal.com/erick-leo-ev/15min): 15 min, confirmed instantly, event type id 7173297. Quick call with Erick Details: https://cal.com/erick-leo-ev/15min.md ## Check availability ```http GET https://api.cal.com/v2/slots?eventTypeId=&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone= cal-api-version: 2024-09-04 ``` The response is `{"data":{"YYYY-MM-DD":[{"start":""}]}}`; no API key is needed. ## Book Each event type's `.md` document lists its required booking fields and the `POST https://api.cal.com/v2/bookings` request (`cal-api-version: 2026-02-25`). ## More - API docs: https://cal.com/docs/api-reference/v2/introduction