“…As a similar group element to sulfur, elemental selenium possesses a high electronic conductivity, approximately 20 orders of magnitude greater than that of sulfur, and has a similar electrochemical reaction towards lithium, forming lithium selenide (Li 2 Se) and alleviating the dissolution of polyselenides (Li 2 Se n , n ≥ 4) for the promising lithium-selenium (Li-Se) battery [9,10,[12][13][14][15][16][17].…”