First, LTO powder (volume-based D50 particle size 0.06 μm, manufactured by Sigma-Aldrich Japan) (100 parts by weight), a dispersion medium (toluene:isopropanol=1:1) (100 parts by weight), a binder (polyvinyl butyral: Product No. BM-2, manufactured by SEKISUI CHEMICAL CO., LTD.) (20 parts by weight), a plasticizer (DOP: Di(2-ethylhexyl)phthalate, manufactured by Kurogane Kasei Co., Ltd.) (4 parts by weight), and a dispersant (product name: RHEODOL SP-O30, manufactured by Kao Corporation) (2 parts by weight) were mixed. The resultant negative electrode raw material mixture was defoamed by stirring under reduced pressure to prepare a LTO slurry with a viscosity of 4000 cP. The viscosity was measured with an LVT viscometer manufactured by Brookfield. The slurry prepared was formed into a LTO green sheet onto a PET film by a doctor blade process. The thickness of the LTO green sheet after drying and firing was adjusted to 250 μm.

(2b) Firing of LTO Green Sheet

The green sheet obtained was cut out into a 25-mm square with a cutter knife and disposed on an embossed zirconia setter. The green sheet on the setter was put into an alumina sheath and kept at 500° C. for 5 hours. Thereafter, the temperature was raised at a heating rate of 200° C./h, to perform firing at 765° C. for 5 hours. The LTO sintered plate obtained was cut into a circular shape with a diameter of 10.5 mm using a laser processing machine, to obtain a negative electrode plate.

(3) Production of Coin-Shaped Lithium Secondary Battery

The coin-shaped lithium secondary battery 10 as schematically shown in FIG. 1 was produced as follows.

(3a) Adhesion of negative electrode plate and negative electrode current collector with conductive carbon paste