Application cases of nanocellulose in battery separators

The application of nanocellulose in battery separator materials has attracted widespread attention, and its unique mechanical properties and adjustable nanostructure make it an ideal choice for improving battery safety and performance. Here are some specific application cases:

1. Nanocellulose-polypropylene composite separator

• Case : A research team from the University of Michigan developed a battery separator based on nanocellulose and polypropylene composite.

• Details : Traditional polypropylene diaphragms tend to shrink at high temperatures, resulting in battery short circuits and safety issues. The research team combined nanocellulose with polypropylene to develop a composite separator. The addition of nanocellulose significantly improves the thermal stability and mechanical strength of the separator, reduces the shrinkage rate of the separator at high temperatures, and thus improves the safety of the battery. Experimental results show that this composite separator exhibits excellent stability in high temperature environments and can effectively prevent the penetration of lithium dendrites .

2. Nanocellulose-polyvinylidene fluoride (PVDF) composite separator

• Case : A research team at Seoul National University in South Korea has developed a battery separator composited with nanocellulose and polyvinylidene fluoride (PVDF) for lithium- ion batteries.

• Details : This study used the high mechanical strength and good wettability of The fibrous structure of nanocellulose helps to form a uniform pore structure, improving the electrolyte wetting and ion conduction ability of the separator. This composite separator exhibits excellent cycle stability and electrochemical properties in lithium-ion batteries while enhancing battery safety.nanocellulose to prepare a composite separator.

3. nanocellulose separators Application of in lithium-sulfur batteries

• Case : The research team at the Swiss Federal Institute of Materials Science and Technology (Empa) has developed a pure nanocellulose separator for lithium-sulfur batteries .

• Details : During the operation The research team used the fine network structure of of lithium-sulfur batteries , the polysulfide intermediate of sulfur can easily diffuse and penetrate the separator, resulting in a degradation of battery performance. nanocellulose to prepare a high porosity separator, which effectively prevented the diffusion of polysulfides. The diaphragm demonstrates excellent performance in lithium-sulfur batteries , significantly improving the battery's capacity retention and cycle life.

4. Nanocellulose-graphene oxide composite separator

• Case : A research team from Nanjing University of Technology in China has developed a battery separator based on the composite of nanocellulose and graphene oxide .

• Details : Researchers combined nanocellulose with graphene oxide to prepare a separator material with high mechanical strength and electrical conductivity. Nanocellulose provides the necessary mechanical support for the membrane, while graphene oxide enhances the electrochemical properties and thermal stability of the membrane. The separator lithium-ion batteries, while improving the safety and cycle life of the battery.shows good electrolyte wetting and ion transport capability in

5. Nanocellulose-polyvinyl alcohol (PVA) composite separator

• Case : A research team from Fudan University in China has developed a separator material composited with nanocellulose and polyvinyl alcohol (PVA) for high safety lithium- ion batteries.

• Details : The research team used the interaction of nanocellulose and PVA to prepare a separator with high mechanical strength and high porosity. Nanocellulose forms a uniform pore structure in the separator, which improves the wetting and ionic conductivity of the electrolyte, and enhances the mechanical stability of the separator. This composite separator exhibits excellent electrochemical properties and thermal stability in lithium-ion batteries, and is particularly suitable for applications with high safety batteries.

These cases show that the application of nanocellulose in battery separator materials can not only improve the mechanical properties and thermal stability of the battery, but also enhance the wetting and ion conduction ability of the electrolyte, significantly improving the overall performance and safety of the battery.