GoKawiilWeLion New Energy Develops Semi-Solid-State Batteries with Record Energy Density
WeLion New Energy has advanced its semi-solid-state battery technology, achieving an energy density of 824 wh/kg in testing during 2025. The company previously released a battery pack with 360 wh/kg in partnership with Nio, supporting over 1,000 km of range, though production costs limited its scale. Additionally, WeLion is developing batteries for maritime applications and exploring higher energy densities.
GoKawiil's interpretation of the reporting above, not reported fact.
This progress suggests that semi-solid-state batteries could significantly enhance energy storage capabilities while improving safety over traditional lithium-ion cells. If scalable, these innovations might influence the future of electric vehicles and large-scale energy storage, especially in China, which is a major emitter of CO2 and seeks cleaner transportation solutions.
- WeLion achieved 824 wh/kg in semi-solid-state battery testing.
- A battery pack with 360 wh/kg supported over 1,000 km range in 2023.
- The company is expanding into maritime energy storage applications.
Source: technologyreview.com — You Xiaoying, 2026-10-06
Published there as: “WeLion New Energy and its semi-solid-state batteries”
Read the original report → The summary and analysis above are GoKawiil's own, written from reporting by the source above. Facts and quotes belong to the original publisher.