US 2024/0405369 A1Published application

Composition for non-aqueous secondary battery functional layer, functional layer for non-aqueous secondary battery, separator for non-aqueous secondary battery, and non-aqueous secondary battery

AssigneeZeon Corporation

InventorsKeisuke TAKISHIMA, Yuzo KITAZAWA

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Abstract

Provided is a composition for a non-aqueous secondary battery functional layer containing non-conductive particles, a water-soluble polymer, and water, wherein the non-conductive particles have a BET specific surface area of 25 m2/g or less, and the following parameter P is 35 or more. Parameter P=packing rate of composition for non-aqueous secondary battery functional layer/Log(BET specific surface area of non-conductive particles), given that: packing rate of composition for non-aqueous secondary battery functional layer (%)={(solid content in composition for non-aqueous secondary battery functional layer (volume %)×volume of composition for non-aqueous secondary battery functional layer in test tube)/volume of sediment layer}×100%.

Claims11

Dependent claims

A composition for a non-aqueous secondary battery functional layer comprising non-conductive particles, a water-soluble polymer, and water, wherein

the non-conductive particles have a BET specific surface area of 25 m2/g or less, and
the composition for a non-aqueous secondary battery functional layer has a parameter P, expressed by formula (1), shown below:
parameter
⁢
P
=
packing
⁢
rate
⁢
of
⁢
composition
⁢
for
⁢
non
-
aqueous
⁢
secondary
⁢
battery
⁢
functional
⁢
layer
/
Log
⁡
(
BET
⁢
specific
⁢
surface
⁢
area
⁢
of
⁢
non
-
conductive
⁢
particles
)
(
1
)
of 35 or more, given that a packing rate of the composition for a non-aqueous secondary battery functional layer in formula (1) is determined based on formula (2), shown below:
packing
⁢
rate
⁢
of
⁢
composition
⁢
for
⁢
non-aqueous
secondary
⁢
battery
⁢
functional
⁢
layer
⁢
(
%
)
=
{
(
solid
⁢
content
⁢
in
⁢
compositon
⁢
for
⁢
non
-
aqueous
⁢
secondary
⁢
battery
⁢
functional
⁢
layer
⁢
(
volume
⁢
%
)
×
volume
⁢
of
⁢
composition
⁢
for
non-aqueous
secondary
⁢
battery
⁢
functional
⁢
layer
⁢
in
⁢
test
⁢
tube
)
/
volume
⁢
of
⁢
sediment
⁢
layer
}
×
100
⁢
%
(
2
)
by calculating a material balance from height of a sediment layer obtained when the composition for a non-aqueous secondary battery functional layer is loaded into a test tube and is subjected to centrifugal sedimentation.

140 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/687,296Filed 9 Sep 2022
Priority: JP 2021-16001229 Sep 2021
Published: 5 Dec 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H01M 50/403
Separators; Membranes; Diaphragms; Spacing elements inside cells: manufacturing processes of separators, membranes or diaphragms
H01M 50/446
Separators, membranes or diaphragms characterised by the material: composite material consisting of a mixture of organic and inorganic materials
H01M 10/0525
Li-accumulators: rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 50/414
Organic material: synthetic resins, e.g. thermoplastics or thermosetting resins

Family

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