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Researchers at Shanghai Jiao Tong University have developed a sodium-sulfur battery prototype with an impressive energy density of 2,021 Wh/kg, comparable to lithium-ion batteries. Utilizing abundant materials like salt and sulfur, this non-flammable battery operates at room temperature and aims to reduce reliance on lithium, cobalt, and nickel, thereby addressing environmental and geopolitical concerns. The technology offers a safer, decentralized alternative for energy storage, promoting greater energy independence.