According to Zhejiang Zhiyuan Technology Co., Ltd.'s official WeChat account (published at 20:03 on August 14, 2026), the joint research among Zhejiang Zhiyuan Technology, Contemporary Amperex Technology Co., Limited (CATL, Ningde), the School of Chemistry and Chemical Engineering of Shanghai Jiao Tong University, Zhejiang Natrium Energy Co., Ltd. (Na Innovation Energy, Shaoxing) and several other research institutions has been published in Energy Storage Materials (Vol. 90, 2026, 105454, DOI: 10.1016/j.ensm.2026.105454). The work addresses three long-standing issues of conventional linear PDOL electrolytes: low-temperature crystallization slowing ion transport, high-temperature depolymerization degrading stability, and interface failure. By introducing dual functional monomers DTD (divinyl sulfate) and TDT (pentaerythritol bis-cyclic sulfate), the team built a moderately cross-linked 3D A2-DTD-TDT polymer electrolyte.
The team systematically validated wide-temperature electrochemical performance at three levels: Na||Na symmetric cells, NFPP||Na half cells, and 3.6 Ah pouch full cells. At -40°C, Na||Na symmetric cells cycled stably for over 6,000 hours without significant voltage fluctuation or continuously rising overpotential. The NFPP||Na system showed stable discharge plateaus from -40°C to 55°C, retaining 97.5% capacity after 800 cycles at -40°C/0.3C. The ionic conductivity reached 0.76 mS cm⁻¹ at -20°C with Na⁺ transference number 0.89.
The 3.6 Ah NFPP pouch full cell retained 88.0% capacity after 500 cycles at -40°C/0.3C, with ultrasonic imaging confirming good internal integrity during cycling, and thermal imaging comparison showing the A2-DTD-TDT system did not exhibit the severe thermal runaway observed in linear A2 and liquid-electrolyte systems under nail penetration. It should be noted that the above data come from laboratory-scale material and cell testing reported in the paper; no downstream partner, mass-production plan, production line construction or commercialization timeline has been disclosed.