Tin solution for tin film formation and method for forming tin film using the same

Patent metadata

Field	Value
Publication number	US-11421334-B2
Application number	US-201916658665-A
Country	US
Kind code	B2
Filing date	Oct 21, 2019
Priority date	Nov 16, 2018
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

A tin solution applicable to tin film formation by solid electrolyte deposition, and a method for forming a tin film using the solution are provided. The tin solution contains tin methanesulfonate, methanesulfonic acid, water, an isopropyl alcohol, and a polyethylene-block-poly (ethylene glycol).

First claim

What is claimed is:

1. A tin solution for tin film formation containing;
tin methanesulfonate;
methanesulfonic acid;
water;
isopropyl alcohol; and
polyethylene-block-poly (ethylene glycol), wherein the polyethylene-block-poly (ethylene glycol) is a lauryl alcohol/ethylene oxide adduct having a count of ethylene oxide units (n) of 9 to 28.

2. The tin solution according to claim 1 ,
wherein a concentration of the methanesulfonic acid in the tin solution is 1 to 25 M.

3. A method for forming a tin film, comprising:
impregnating a solid electrolyte membrane having a sulfo group with the tin solution according to claim 1 ;
disposing the solid electrolyte membrane between a substrate as a cathode and an anode such that the substrate is in contact with the solid electrolyte membrane; and
applying a voltage between the anode and the substrate to deposit tin on a surface of the substrate.

4. The tin film forming method according to claim 3 ,
wherein in the impregnating, a temperature of the tin solution is equal to or higher than a freezing point of the tin solution, and lower than 35° C., and
wherein in the applying the voltage, a temperature of the substrate is equal to or higher than 35° C., and equal to or lower than a glass transition temperature of the solid electrolyte membrane.

Assignees

• Toyota Motor Co Ltd

Inventors

• Iisaka Hirofumi

Classifications

• C25D3/32 Primary

  characterised by the organic bath constituents used · CPC title

• H01M8/1027

  having carbon, oxygen and other atoms, e.g. sulfonated polyethersulfones [S-PES] · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/0416

  involving impregnation with a solution, dispersion, paste or dry powder (H01M4/0438 takes precedence) · CPC title

• H01M2300/0082

  Organic polymers · CPC title