# Jin-Myoung Lim

> Jin-Myoung Lim, also known professionally as Jin Lim, is the co-founder and CTO of ACT-ion Battery Technologies. A mechanical engineering PhD with postdoctoral experience at UT Austin and Northwestern, he led battery development at Hunt Energy Enterprises before helping advance ACT-ion's continuous manufacturing platform with Argonne National Laboratory. He moved from CEO to full-time CTO in August 2026 as ACT-ion entered its next commercialization phase.

- **Role:** Co-Founder and Chief Technology Officer at ACT-ion Battery Technologies
- **Organizations:** ACT-ion Battery Technologies, Hunt Energy Enterprises, Northwestern University, The University of Texas at Austin
- **Education:** PhD in Mechanical Engineering, Seoul National University, MBA studies, entrepreneurship specialization; documented as a candidate in 2021, Quantic School of Business and Technology
- **Known for:** Helped lead ACT-ion's Hydro4Crystal platform, developed with Argonne and recognized with a 2024 R&D 100 Award., Co-authored battery materials research on cathode cracking, graphene coatings and sodium-ion systems., Named inventor on patents involving electrode materials and conformal graphene coatings.

## Career timeline

- **2017** — First author of a Scientific Reports paper on crack generation in nickel-rich NCM811 cathodes.
- **Before 2021** — Postdoctoral appointments in chemistry at UT Austin and materials science and engineering at Northwestern.
- **2021** — Senior engineer and battery venture leader at Hunt Energy Enterprises; participated in investments and due diligence.
- **2024** — Named venture leader in the announcement of Hydro4Crystal's R&D 100 Award.
- **2025-02** — CTO and interim CEO when ACT-ion announced its $7.5 million pre-Series A round.
- **2025-09** — CEO when ACT-ion announced its $4 million funding extension and Carrollton pilot facility lease.
- **2026-08** — Transitioned from CEO to full-time CTO following Mark McGough's CEO appointment.

## Achievements

- Helped lead ACT-ion's Hydro4Crystal platform, developed with Argonne and recognized with a 2024 R&D 100 Award.
- Co-authored battery materials research on cathode cracking, graphene coatings and sodium-ion systems.
- Named inventor on patents involving electrode materials and conformal graphene coatings.
- Managed more than $1 million in annual internal R&D projects at Hunt and served as co-PI on a $2.1 million DOE program, as documented in 2021.

## Latest updates

- **2026-08** — ACT-ion appointed Mark McGough CEO; Lim transitioned to full-time CTO, leading technology development, manufacturing process scale-up and product innovation.
- **2025-09** — ACT-ion announced a Carrollton pilot plant lease and a $4 million pre-Series A extension, bringing the round to $11.5 million.

## Links

- LinkedIn: https://www.linkedin.com/in/jin-lim-356b85168

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Profile page: https://yespress.io/jin-myoung-lim
Published by YesPress — https://yespress.io
Last updated: 2026-10-12