Abstract: A double-sided all-solid-state thin-film lithium battery is provided, which may include a conductive substrate, a first upper electrode layer, a second upper electrode, an upper electrolyte layer, an upper current collecting layer, a first lower electrode layer, a second lower electrode layer, a lower electrolyte layer and a lower current collecting layer. The first upper electrode layer may be disposed at one side of the conductive substrate. The upper electrolyte layer may be disposed between the first and the second upper electrode layer. The upper current collecting layer may be disposed at one side of the second upper electrode layer. The first lower electrode layer may be disposed at the other side of the conductive substrate. The lower electrolyte layer may be disposed between the first and the second lower electrode layer. The lower current collecting layer may be disposed at one side of the second lower electrode layer.

Abstract: A method for manufacturing polycrystalline electrode is provided, which may include the following steps: providing a conductive substrate; using a film coating method to deposit an active material on one side of the conductive substrate by a hydrogen-containing plasma source to form an electrode layer; executing a thermal annealing process for the electrode layer in an oxygen-containing environment. The grains of the polycrystalline electrode manufactured by the method will be more uniform in size, which can significantly increase the volumetric energy density of thin-film battery to significantly improve its performance.

Abstract: A thin film battery structure includes a substrate, a first current collector layer, a first electrode layer array, an electrolyte layer, a second electrode layer, and a second current collector layer. The first current collector layer is disposed on the substrate and has at least one first current collector bump. The first electrode layer array has at least one first electrode layer, where each first electrode layer is disposed on the first current collector layer, and at least one first current collector bump is embedded inside each first electrode layer. Each first electrode layer is embedded inside the electrolyte layer. The second electrode layer is disposed on the electrolyte layer. The second current collector layer is disposed on the second electrode layer.

Abstract: A thin film battery structure includes a substrate, a first current collector layer, a first electrode layer array, an electrolyte layer, a second electrode layer, and a second current collector layer. The first current collector layer is disposed on the substrate and has at least one first current collector bump. The first electrode layer array has at least one first electrode layer, where each first electrode layer is disposed on the first current collector layer, and at least one first current collector bump is embedded inside each first electrode layer. Each first electrode layer is embedded inside the electrolyte layer. The second electrode layer is disposed on the electrolyte layer. The second current collector layer is disposed on the second electrode layer.