【Technology Introduction】
 Lithium-ion batteries have penetrated human daily lives and employed in a variety of applications, including consumer electronics, wearable products, electric vehicles (EV), and green energy storage devices. However, the most popular lithium batteries in the market use graphite as the negative electrode of ion storage material, which occupies a substantial amount of weight and volume in lithium batteries, making it difficult to break the upper bound in energy density (~350 Wh/kg) due to technical issues. Based on the pursuit of high capacity density and considering the optimization between performance, cost, and safety, the anode-less gel polymer electrolyte lithium battery technology with high-capacity positive and negative electrode collector substrate has the potential to replace the existing commercial lithium-ion batteries which using graphite as the negative electrode for ion storage (Fig. 1). According to the research, the cathode market for lithium batteries using graphite as an ion storage material will exceed US$100 billion by 2025. Therefore, the market value of the anode-less gel polymer electrolyte lithium battery technology will become more and more attractive. (Figure 2).


Figure 1. Structure of Anode-Lss Gel Polymer Electrolyte Lithium Battery


Figure 2. Trends in the global lithium battery market size


【Project Planning/Technology Application】
 NARI developed a new technology for the type of anode-less gel polymer electrolyte lithium battery, which can be charged/discharged at room temperature and applied in current lithium battery products. Collaboration with battery and cell manufacturers can hasten its industrialization and commercialization. This method has recently reached a 50-cycle life for gel polymer lithium batteries with anode-less structures under 0.1C rate charging and discharging circumstances (Fig. 3). As seen in Fig. 4, NARI will continue to develop the anode-less gel polymer electrolyte lithium battery technology in order to approach higher capacity density and further application.


Figure 3.  Charge and discharge cycle test for anode-less gel polymer electrolyte lithium battery


Figure 4. Development and promotion of gel polymer electrolyte lithium battery technology

【Future Arrangements】
 NARI endeavors to engage in the technology development of green energy and system integration, and has advised domestic manufacturers on technology upgrades. Now, NARI has successfully developed the anode-less gel polymer electrolyte lithium battery technology and will continue to collaborate with manufacturers for technology transfer and help them to conduct performance improvement tests on lithium batteries implemented with this technology. In response to the high demand for lithium batteries, NARI will work with domestic companies to set up an anode-less gel polymer electrolyte lithium battery production line and approach the energy storage industry.


【Contact Information】
Name： Hsueh, Tien-Hsiang
Tel：886-3-4711400 Ext.7320
E-mail：tshsueh@nari.org.tw