In recent years, researchers from the Qingdao Key Laboratory of Solar Energy Storage, established by the Qingdao Institute of Bioenergy and Bioprocess Technology under the Chinese Academy of Sciences, have made significant breakthroughs in energy storage materials. Their findings have been published in top-tier journals such as *Nature*, *Chem. Commun.*, *J. Phys. Chem. Lett.*, and *Electrochimica Acta*.
One major challenge in lithium-ion battery development is the separator, which acts as a critical component that limits performance and safety. To address this, the laboratory led by Kong Qingshan and Zhang Jianjun developed a high-performance flame-retardant cellulose composite separator using an innovative wet papermaking and interface compounding technique. This new material offers excellent thermal stability, flame resistance, and electrolyte wettability, significantly enhancing battery safety and longevity. The research was published in *Nature Communications* (2013, DOI: 10.1038/srep03935), *RSC Advances* (2013, DOI: 10.1039/C3RA45879B), and *ACS Sustainable Chemistry & Engineering* (2013, DOI: 10.1021/ssc400370h).
Another area of focus has been perovskite solar cells, which gained attention for their low cost and high efficiency. The lab developed a novel perovskite material, NH₂CH=NH₂PbI₃, with a band gap of 1.43 eV, expanding its light absorption range and improving photovoltaic conversion efficiency. The material also shows good thermal stability, making it promising for flexible and low-cost solar applications. This work was published in *Chemistry of Materials* (DOI: 10.1021/cm404006p), with patent protection applied for.
Silicon and germanium-based anodes have shown great potential due to their high theoretical capacity, but their volume expansion during cycling has limited their practical use. The team led by Zhang Chuanjian addressed this issue by embedding nano-sized silicon and germanium into an elastic scaffold, effectively mitigating expansion and improving cycle life. These results were featured in *RSC Advances* (2013, 3, 1336–1340) and *ACS Applied Materials & Interfaces* (2013, 5, 12340–12345).
Lithium-air batteries are considered one of the most promising next-generation power sources, with energy density comparable to gasoline. However, their cycle life remains a challenge. Researchers such as Zhang Lixue and Dong Chua improved the performance by reducing side reactions through interface engineering, leading to better durability. Their work appeared in *Chem. Commun.* (2013, 49, 3540–3542), *ACS Appl. Mater. Interfaces* (2013, 5, 3677–3682), and *J. Phys. Chem. Lett.*
To enhance the safety of lithium-ion batteries, Liu Zhihong developed a new single-ion polymer lithium borate salt (patents CN201210425872.3 and CN201210425838.6). This environmentally friendly electrolyte exhibits superior thermal stability, with decomposition temperatures above 300°C. Even at 80°C, batteries using this electrolyte show excellent cycle performance, as reported in *Electrochimica Acta* (2013, 92, 132–138). It also improves the high-temperature stability of lithium manganese oxide batteries.
Building on these achievements, the Qingdao municipal government has decided to establish the Qingdao Institute of Energy Storage Industry Technology, leveraging the laboratory's expertise. The institute aims to foster innovation, support startups, and drive the growth of the energy storage industry in Qingdao, positioning it as a hub for talent, technology, and business in the field.
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