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recently, solid-state batteries have attracted market attention. on september 4, the solid-state battery sector rose and strengthened. as of the close of the midday trading on the same day, the solid-state battery sector (bk.0968) index rose 2.25% to 1110.24, setting a new high since mid-july this year. at the individual stock level, narada power has achieved a "20cm" daily limit for three consecutive trading days, with a cumulative increase of nearly 73% since september; in addition, polydi and del shares also rose by "20cm", huafeng shares, fengyuan shares, dongfeng group, and kesen technology rose by the daily limit, among which kesen technology has risen by the daily limit for 8 consecutive trading days, with a cumulative increase of more than 114%.

in recent days, there has been a lot of news in the solid-state battery industry. first, penghui energy announced on august 21 that it had made a major breakthrough in all-solid-state batteries, refocusing the market's attention on solid-state batteries. on august 28, penghui energy released the first generation of solid-state batteries, saying that its core advantages are safety and cost reduction. in terms of technology, it has achieved innovation in electrolyte wet coating and solved the problem of oxide electrolyte preparation technology. the overall cost of solid-state batteries using this process is expected to be only about 15% higher than that of conventional lithium batteries.

penghui energy said that the energy density of the solid-state battery is 280wh/kg. in 2025, with the use of a higher proportion of silicon-based negative electrodes on the material side, the energy density will reach more than 300wh/kg. penghui energy expects to start pilot research and development and small-scale production in 2025, and officially establish a production line and mass production in 2026.

then, on august 29, the qingdao institute of bioenergy and process technology of the chinese academy of sciences announced on its official wechat account that it had made important progress in high-capacity cathode materials for sulfide all-solid-state batteries. it is reported that the institute recently developed a high-energy, long-cycle all-solid-state lithium-sulfur battery based on a lithium sulfide cathode, with an energy density of more than 600wh/kg. compared with commercial lithium-ion batteries, its energy density is more than 1 times higher; and because it does not use rare metals, it completely solves the problem of high cost of lithium battery cathode materials.