DISPERSION LIQUID, METHOD FOR PRODUCING DISPERSION LIQUID, SLURRY, METHOD FOR MANUFACTURING POWER STORAGE ELEMENT, AND POWER STORAGE ELEMENT

To provide a power storage element in which particles of a sulfide solid electrolyte are satisfactorily bonded to each other by fluorine resin particles, and deterioration in the sulfide solid electrolyte in production is suppressed, and a method for manufacturing the same.SOLUTION: A power storage element includes an electrolyte-containing layer obtained by drying a coated matter of a solid electrolyte-containing slurry containing a low polar solvent, particles of a fluorine resin and particles of a sulfide solid electrolyte, wherein the low polar solvent is at least one of a hydrocarbon compound, and a compound having only a hydrocarbon group and an ether group in the molecule, an average particle diameter of the particles of the fluorine resin is 200 nm or less, and the fluorine resin exists between the particles of the sulfide solid electrolyte in the electrolyte-containing layer.SELECTED DRAWING: Figure 1 【課題】フッ素樹脂粒子によって硫化物固体電解質の粒子同士が良好に結着され、しかも、製造時における硫化物固体電解質の劣化が抑制されている蓄電素子、およびその製造方法を提供する。【解決手段】蓄電素子は、低極性溶媒と、フッ素樹脂の粒子と、硫化物固体電解質の粒子と、を含む固体電解質含有スラリーの塗布物が乾燥処理された電解質含有層を備え、前記低極性溶媒は、炭化水素化合物、並びに、炭化水素基及びエーテル基のみを分子中に有する化合物のうち少なくとも一方であり、且つ、前記フッ素樹脂の粒子の平均粒子径は、２００ｎｍ以下であり、前記電解質含有層では、前記硫化物固体電解質の粒子間に前記フッ素樹脂が存在している。【選択図】図１