COIN-TYPE LITHIUM SECONDARY CELL

A coin-type lithium secondary cell for soldering by reflow method includes a positive electrode including a lithium composite oxide, a negative electrode, an electrolyte layer provided between the positive electrode and the negative electrode and including an electrolytic solution, a cell case having an enclosed space in which the positive electrode, the negative electrode, and the electrolyte layer are housed. The positive electrode and the negative electrode as a whole contains 3.0% by mass or less of lithium carbonate.