Core Viewpoint - Honeycomb Energy has unveiled its complete technical roadmap and mass production plan for semi-solid-state batteries, showcasing advancements in solid electrolyte preparation and high-entropy cathode materials during its sixth Battery Day event [1]. Manufacturing Process - Honeycomb Energy has pioneered the "solid electrolyte transfer technology," which consists of electrolyte membrane transfer and gradient hot-pressing processes. This technology allows solid electrolyte coatings to cover electrode sheets and is compatible with existing liquid battery production lines, thus controlling manufacturing costs and lowering mass production thresholds [2]. - The semi-solid-state architecture has improved the self-heating temperature (T1) of the battery cells by 8°C and the thermal runaway initiation temperature (T2) by 5°C, increasing the safety buffer time by 10%. This technology reduces the probability of thermal runaway by 25% and stabilizes the thermal runaway process even under extreme conditions, leading to a 20% reduction in overall system protection costs [2]. Material Improvements - The introduction of solid coatings effectively cuts off micro-short circuit paths between the anode and cathode, significantly resisting foreign object punctures and microscopic defects in the separator. Market statistics indicate that this improvement has reduced the pressure difference defect rate by 18.5%, mitigating range degradation issues caused by pressure differences [3]. - Honeycomb Energy has made progress in "multi-element synergistic high-entropy cathode materials," enhancing thermal stability by increasing the DSC exothermic peak by 5°C through low-cost fast ion conductor in-situ coating technology. Additionally, high-entropy doping technology with multiple high-valent transition metal elements has improved high-temperature cycle life by 20% [4]. - In the anode material sector, Honeycomb Energy has introduced "interface-controlled anode composite" technology. The three-dimensional silicon-carbon precursor carbon doping technology has improved electronic conductivity by 20% and reduced material expansion by 20%. Surface modification technology for graphite has significantly increased the lithium-ion diffusion coefficient by 50%, further reducing material expansion by 5% [5]. - The company has developed "ultra-high lithium flux electrolyte technology," which employs weak coordination/small molecule composite solvents, resulting in an 18% reduction in electrolyte viscosity and a 15% improvement in cell charging capability. Additionally, a dynamic self-adaptive passivation film has successfully increased cell cycle life by 15% and reduced gas generation by 40% [6]. Product Development and Mass Production - Honeycomb Energy has planned three generations of semi-solid-state batteries: - The first generation, a high-nickel semi-solid-state battery, has completed development and achieved small-scale production with an energy density of 270 Wh/kg, already used in a European passenger car brand [7]. - The second generation, also a high-nickel semi-solid-state battery, has an energy density of 342 Wh/kg and is aimed at the low-altitude aircraft sector, having completed installation test flights [7]. - The medium-nickel semi-solid-state battery, targeting the mid-to-high-end passenger car market, has an energy density of 245 Wh/kg and is scheduled for mass production in October 2026 [7]. - Additionally, Honeycomb Energy has introduced the Longscale Armor 3.0 technology, which achieves thermal-electric separation based on square battery shapes, compatible with CTC (Cell to Chassis) and CTB (Cell to Body) integration designs. The integrated semi-solid-state technology is planned for initial customer platform deployment and mass production delivery in the first quarter of 2027 [8].