UNS – Universitas Sebelas Maret (UNS) Surakarta has officially inaugurated Prof. Dr. T. Ir. Endah Retno Dyartanti, M.T., as a Professor. She specializes in Electrochemical Process Technology – Membrane Technology. Her inaugural speech, titled “Natural Polymer-Based Separator Membranes for Enhancing Battery Capacity and Safety Towards Battery Industry Independence in Indonesia,” addressed key advancements in battery technology.
The Rector of UNS, Prof. Dr. Hartono, dr., M.Si., officiated the inauguration during an Open Senate Session on Monday (10/2/2025). The ceremony took place at the G.P.H. Haryo Mataram UNS Auditorium. Prof. Endah Retno is now the 33rd Professor at the Faculty of Engineering (FT) and the 334th Professor at UNS.
Advancing Lithium-Ion Battery Technology
In her speech, Prof. Endah Retno highlighted that portable electronic devices, electric vehicles, and grid-scale energy storage systems (ESS) primarily rely on Lithium-Ion Batteries (LIBs). To support large-scale renewable energy adoption, cost-effective, energy-efficient, and environmentally friendly LIBs are essential.
She explained that natural polymers are emerging as an alternative to polyolefin polymers currently used in separator membranes. Polyolefins have excellent insulation, mechanical strength, and electrochemical stability. However, they have low thermal stability. In contrast, natural polymers offer higher thermal stability, environmental sustainability, and better safety features for LIBs.
“Manufacturers primarily use polyolefins such as polyethylene (PE) and polypropylene (PP) to produce commercially available separator membranes. While these materials provide good insulation and strength, they pose environmental concerns and have low thermal stability. Natural polymers are abundant, sustainable, and have enhanced thermal stability. These properties help improve LIB safety and lifespan. As a result, they serve as a viable alternative,” Prof. Endah stated.
The Role of Separator Membranes in Battery Safety
The separator is a critical component in LIBs, directly influencing safety, lifespan, and electrochemical performance. A high-quality separator must have high porosity, strong electrolyte affinity, and substantial electrolyte absorption. Developing separators with superior mechanical strength and thermal stability is crucial for large-scale battery applications.
“Advanced separators play a key role in improving battery safety and electrochemical performance. A well-designed separator should be able to shut down the battery during a short circuit or excessive temperature rise. Fire-resistant separators are crucial to preventing combustion spread during thermal runaway,” Prof. Endah added.
She emphasized that producing natural polymer-based separator membranes is generally simpler. This process is also more environmentally friendly compared to synthetic polymer-based alternatives. This innovation supports the development of a more independent and sustainable battery industry in Indonesia. Advancements in raw material availability, manufacturing technology, and battery safety support the development of natural polymer-based separators. These separators could significantly contribute to achieving battery industry independence in the country.
Humas UNS
Reporter: Dikky Yudi Pradana
Editor: Dwi Hastuti
