ALL-SOLID-STATE BATTERY

To provide an all-solid-state battery excellent in rate characteristics.SOLUTION: A solid electrolyte battery according to an embodiment includes a positive electrode 20, a negative electrode 30, and a solid electrolyte layer 10 between the positive electrode 20 and the negative electrode 30. The solid electrolyte layer 10 has a first region A1 and a high halogen region A2 having a halogen concentration higher than that of the first region A1. The first region A1 contains a compound represented by Li2+aE1-bGbDcXd (1). The high halogen region A2 is located closer than the first region A1 to at least one of an interface between the positive electrode 20 and the solid electrolyte layer 10 and an interface between the negative electrode 30 and the solid electrolyte layer 10.SELECTED DRAWING: Figure 2 【課題】レート特性に優れる全固体電池を提供することを目的とする。【解決手段】本実施形態にかかる固体電解質電池用負極は、正極２０と、負極３０と、前記正極２０と前記負極３０との間の固体電解質層１０とを備え、前記固体電解質層１０は、第１領域Ａ１と、前記第１領域よりハロゲン濃度が高い高ハロゲン領域Ａ２とを備え、前記第１領域Ａ１は、Ｌｉ２＋ａＥ１－ｂＧｂＤｃＸｄ・・・（１）で表される化合物を含み、前記高ハロゲン領域Ａ２は、前記第１領域Ａ１より前記正極２０と前記固体電解質層１０との界面と前記負極３０と前記固体電解質層１０との界面とのうち少なくとも一方の近くにある。【選択図】図２