Ion conductive inks and solutions for additive manufacturing of lithium microbatteries

Patent metadata

Field	Value
Publication number	US-2018301678-A1
Application number	US-201815983914-A
Country	US
Kind code	A1
Filing date	May 18, 2018
Priority date	Oct 13, 2015
Publication date	Oct 18, 2018
Grant date	—

Abstract

A separator made of ion conductive ink is produced by additive manufacturing. A micro-battery is produced with the separator made of ion conductive ink located between the battery's anode and cathode. The separator functions to keep the anode and cathode apart and to facilitate the transport of ions to produce an operative micro-battery.

First claim

1 . A micro-battery apparatus, comprising:
a battery casing; an anode electrode connected to said battery casing; a cathode electrode connected to said battery casing; a separator in said battery casing connected to said anode electrode and said cathode electrode, said separator made of ion conductive ink; a matrix of anode micro-channels in said separator body; a matrix of cathode micro-channels in said separator body; an anode material in said anode micro-channels; and an cathode material in said cathode micro-channels.

2 . The micro-battery apparatus of claim 1 wherein said separator is made of Lithium Bis(trifluoromethane)sulfonimide, LiTFSI) and tetraglyme solvent added to a photo-curable resin formulation, and dried using supercritical CO 2 .

3 . The micro-battery apparatus of claim 1 wherein said separator is made of methacrylpropylsulfate (MPS) salts and PEGDA.

4 . The micro-battery apparatus of claim 1 wherein said separator is made of methacrylpropylsulfate salts and PEGDA/PEGMA having a

chemical structure.

5 . The micro-battery apparatus of claim 1 wherein said separator has a gyroid structure.

6 . The micro-battery apparatus of claim 1 wherein said matrix of anode micro-channels in said separator body and said matrix of cathode micro-channels in said separator body do not interconnect and form self-contained matrices for said anode material in said anode micro-channels and said cathode material in said cathode micro-channels.

7 . The micro-battery apparatus of claim 1 wherein said matrix of anode micro-channels in said separator body and said matrix of cathode micro-channels in said separator body are interwoven to provide an interpenetrating network.

8 . The micro-battery apparatus of claim 1 wherein said separator has a first surface and a second surface opposite said first surface and wherein said matrix of anode micro-channels in said separator body extend from said first surface and said matrix of cathode micro-channels in said separator body extend from said second surface.

9 . The micro-battery apparatus of claim 1 wherein said separator has a first surface and a second surface opposite said first surface, wherein said separator has first openings in said first surface and wherein said first openings are connected to said matrix of anode micro-channels, wherein said separator has second openings in said second surface and wherein said second openings are connected to said matrix of cathode micro-channels.

Assignees

• L Livermore Nat Security Llc

Inventors

• Duoss Eric B
• Campbell Patrick G
• Floyd Iii William C
• Mancini Julie A
• Merrill Matthew
• Sharpe Conner T
• Spadaccini Christopher M
• Stadermann Michael
• Zhu Cheng

Classifications

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• C09D11/00

  Inks · CPC title

• H01M10/0436 Primary

  Small-sized flat cells or batteries for portable equipment · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M6/40

  Printed batteries {, e.g. thin film batteries} · CPC title