‘Xiǎomǐ’ is the Chinese word for ‘millet’. Millet is a gluten-free grain, which can sprout and progressively propagate a nutritious crop. Xiaomi, on the other hand, is a Chinese multinational corporation, and technology company active in the electric vehicle market. Xiaomi has patented a solid state battery with multilayered electrolyte, according to Marius Preston, in LinkedIn on June 14, 2025.
Solid State Battery With Multilayered Electrolyte Unpacked
A multilayered solid battery electrolyte, typically comprises several layers of different materials. These materials enhance performance, while addressing limitations of single-layer versions. We could not locate the patent, and so we cast around to discover more about it.
Marius Preston explains how the multilayered electrolyte forms around the current collector. Each layer contains active materials, conductive agents, binders, and a solid electrolyte of polymers and metal salts.
The electrolyte “penetrates vertically through the electrode, reducing the distance ions need to travel, and significantly enhancing battery performance.” We understand this version adapts readily to current lithium battery design.
SMM is a leading metals provider. They confirm how forming the electrolyte vertically around a thick electrode, reduces the metal ion shuttling distance. Pairing this arrangement in a solid state battery with multilayered electrolyte, should therefore accelerate discharging and recharging.
More Tantalizing Details About The Multilayer Electrolyte
Yahoo News explains the Xiaomi solid state battery prototype, has a cell-to-body design, whereby the cells integrate directly into the vehicle body. As opposed to rather being in separate modules in a pack, as is the convention.
This innovation should reduce weight, increase passenger space, and underpin chassis strength. The overall battery height (including vehicle floor) is an impressive 4.7 inches. In addition, the Xiaomi battery promises an EV driving range of 745 miles, while fast charging to 500 miles in 10 minutes.
This certainly seems to be a winning combination, that should cause ripples in the pond of our world of batteries …
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