Rechargeable paper battery could be more powerful than lithium says startup

A Singaporean startup, Flint, claims to have developed for a sustainable battery from paper that can store more than 220 Wh/kg.

A fully sustainable paper battery could be recycled or composted at the end of its lifecycle, with Flint claiming that its design can offer energy density at 226 Wh/kg, falling within the capabilities of existing Lithium batteries.

Designed with mass production in mind, Flint says that its product will have a life cycle comparable to traditional battery technologies, unlike single-use paper battery designs.

The company’s battery chemistry differs from traditional lithium batteries by relying on cellulose plant material as the medium for ion transfer between the anode and cathode, replacing cobalt and lithium with recyclable metals such as zinc and manganese.

Flint closed a $2 million USD seed funding round in late 2024 and aims to direct that money towards commercial expansion, as well as intellectual property development, and a pilot production program for 2025.

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