Wensheng He

US Patent:

20180072829, Mar 15, 2018

Filed:

Mar 15, 2016

Appl. No.:

15/557977

Inventors:

- King of Prussia PA, US
Wensheng HE - Wayne PA, US
James F. COFFEY - Broomall PA, US
Chris CAVALIER - Ambler PA, US
Steven M. BAXTER - Chalfont PA, US
Sara REYNAUD - King of Prussia PA, US

International Classification:

C08F 114/22

Abstract:

The invention relates to fluoropolymers that have been modified with low molecular weight, polymeric chain transfer agents, and uses of the modified fluoropolymers. The modified fluoropolymers provide enhanced properties to the fluoropolymer, such as increased adhesion, and hydrophilic characteristics. The modified functional fluoropolymers are useful in many applications, including as binders in electrode-forming compositions and separator compositions, for hydrophilic membranes and hollow fiber membranes, as an aqueous and a solvent cast coating for baked decorative and protective coatings, and as a tie layer between a fluoropolymer layer and an incompatible polymer layer.

US Patent:

20170125815, May 4, 2017

Filed:

Jun 3, 2015

Appl. No.:

15/315965

Inventors:

- King of Prussia PA, US
Jason POMANTE - Glen Mills PA, US
Wensheng HE - Wayne PA, US

International Classification:

H01M 4/62
H01M 10/0525
H01M 4/139
H01M 4/04

Abstract:

The invention relates to an electrode formed by the blending of dry active powdery electrode forming materials with an aqueous binder dispersion, and the subsequent adhering of the wet binder/dry active powdery electrode-forming materials blend to an electroconductive substrate, resulting in an electrode. The aqueous binder is preferably a fluoropolymer, and more preferably polyvinylidene fluoride (PVDF). The hybrid process provides the good dispersion and small particle size of a wet process, with the energy savings and reduced environmental impact of a dry process. The resulting electrode is useful in energy-storage devices.

US Patent:

20150340676, Nov 26, 2015

Filed:

Nov 1, 2013

Appl. No.:

14/410674

Inventors:

- King of Prussia PA, US
Scott R. GABOURY - Blue Bell PA, US
Ramin AMIN-SANAYEI - Malvern PA, US
Chirstophe ROGER - Ithaca NY, US
Wensheng HE - Wayne PA, US
Rosemary HEINZE - Haddonfield NJ, US

Assignee:

Arkema Inc. - King of Prussia PA

International Classification:

H01M 2/16
H01M 2/14

Abstract:

The invention relates to integrated electrode separators (IES), and their use in lithium ion batteries as replacements for free standing separators. The IES results from coating an electrode with a fluoropolymer aqueous-based emulsion or suspension, and drying the coating to produce a tough, porous separator layer on the electrodes. The aqueous fluoropolymer coating may optionally contain dispersed inorganic particles and other additives to improve electrode performance such as higher ionic conduction or higher temperature use. The IES provides several advantages, including a thinner, more uniform separator layer, and the elimination of a separate battery component (separator membrane) for a simpler and cost-saving manufacturing process. The aqueous separator coating can be used in combination with a solvent cast electrode as well as an aqueous cast electrode either in two separate process steps, or in a one-step process.