MAGNESIUM BATTERY

PROBLEM TO BE SOLVED: To solve the problem in which: in a multi-cell battery in which a plurality of magnesium battery cells are connected in series in the same container, there is a case where negative electrode active material of a cell closer to a positive electrode side of the battery disappears quickly and battery life ends although negative electrode active material of other cells is still remained; this phenomenon can be prevented by sealing encapsulation of each cell, but structure is made complicated, and the battery becomes larger and costly; it is a problem to adjust time so that negative electrode active material of each cell disappears at the same time by simple method without sealing the cells.SOLUTION: Negative electrode active material (51, 41) of cells connected close to a positive electrode (62) of a magnesium battery (10) is made thicker than negative electrode active material (41, 31) of cells connected closer to a negative electrode (61) side.SELECTED DRAWING: Figure 2 【課題】マグネシウム電池セルの複数個を同一容器内で直列接続したマルチセル型電池において、電池の正極側に近いセルの負極活物質が早く消滅し、他セルの負極活物質が残ったまま電池寿命を終えてしまうことがある。本現象は各セルを密閉封止すると防止できるが、構造が複雑化して電池の大型化・高コスト化を生じてしまう。セルの密閉をせず簡便な方法で各セルの負極活物質が消滅する時期を揃えることが課題である。【解決手段】マグネシウム電池（１０）の正極（６２）近くに接続されたセルの負極活物質（５１、４１）を、より負極（６１）側に接続されたセルの負極活物質（４１、３１）に比べてより厚いものとする。【選択図】 図２