Electronic devices are rapidly developing towards lightweight, miniaturization, environmental protection and integration. To solve the practical application needs of smart communications, mobile medical care and other fields, an energy supply system that matches it is urgently needed. Therefore, it is particularly important for wearable and smart electronic devices to develop and utilize flexible multifunctional lithium-ion batteries. Nanocellulose can be combined with other lithium host components as a flexible substrate in anode/cathode composite. Table 2 summarizes and compares the electrochemical properties and strategies of various nanocellulose-based flexible lithium-ion battery electrode composites. Li et al. prepared neatly arranged CNF/RGO composite microfibers by carbonization after wet spinning. Prepared fiber conductivity up to 649±60 S cm-1 lithium-ion battery anode. The stable discharge capacity of the anode is 312 mAh g-1. Wang et al.

Because nanocellulose has good mechanical properties, hydrophilicity, fine nanostructure and high porosity, it is widely used as the separator/electrolyte of supercapacitors. Lee et al. reported a nanoporous cellulose separator with a bilayer nanostructure and high porosity. In this work, the top layer is a nanoporous thin pad of tripyridine functionalized CNF and the support layer is a thick macroporous pad of electrospun polyvinylpyrrolidone/polyacrylonitrile. The unique porous bilayered/asymmetric structure balances ion transport rate and leakage current. The cycling performance of the device assembled with this unique nanocellulose-based separator has been substantially improved. Wu and colleagues reported a flexible cellulose-based hydrogel film with layered porosity and a double crosslinked structure. Inside the membrane, cellulose and polyacrylamide (PAM) are cross-linked by PDA. By adjusting the dopamine/acrylamide ratio, it was found that the key factors affecting the mechanical properties of the hydrogel were

Lithium-sulfur batteries have attracted much attention because of their high theoretical volume energy density (2800 Wh L-1) and gravity energy density (2500 Wh kg-1) and their capacity far exceeds that of traditional lithium-ion batteries. Therefore, the development of high-performance flexible lithium-sulfur batteries can better meet the needs of future flexible wearable electronic devices. In addition, elemental sulfur has outstanding characteristics such as abundant resources and low price, making lithium sulfur batteries an attractive EES. First, during the electrochemical cycle, the volume change of sulfur particles will lead to structural changes of the active material, thereby reducing capacity. Secondly, insulating sulfur and Li2S will slow down the electrochemical kinetics. Third, polysulfides are easily dissolved in the electrolyte, resulting in 'shuttle phenomenon'. To solve these problems, various attempts have been made in the design and preparation of new electrodes, electrolytes and separators. 1. Flexible electrodes can integrate nanocellulose and active materials

The diaphragm of the LIB is located between the anode and the cathode. It prevents short circuits from the anode and cathode from contact. The electrolyte acts as an electrolyte reservoir and forms a lithium ion transport channel during the charging/discharging process. Due to the excellent mechanical and thermal properties of nanocellulose-based paper/film materials, they have been used in lithium batteries to improve power density, energy density, safety and cycle life by affecting battery dynamics, by influencing battery dynamics. . Recently, Sun et al. introduced ZIF8 into the CNF system through in-situ synthesis to improve the pore structure of the composite separator. The introduction of ZIF8 prevents the aggregation of CNF and makes the pore distribution more uniform. The ZIF8-CNF composite separator not only provides the advantages of an environmentally friendly CNF, but also exhibits excellent thermal stability (thermal stability up to 200 °C). These composite membranes have faster wetting speed and better surface wetting.

Nanocellulose has great potential for application in aerospace materials, mainly because it has lightweight, high strength and renewable properties, which meets the strict requirements for material performance in the aerospace field. Here are some of the key applications of nanocellulose in aerospace materials: 1. Lightweight composite spacecraft require very high material weight, as reducing weight can significantly reduce fuel consumption and launch costs. Nanocellulose has extremely low density, but also has excellent mechanical strength. It can be combined with other materials to make lightweight composite materials and is used in spacecraft structures. These composite materials are not only light, but also provide sufficient structural support, suitable for use in spacecraft fuselages, wings and other components. 2. Thermal protection materials The spacecraft experiences extremely high temperatures when entering or returning to the atmosphere, and requires highly heat-resistant materials to protect the spacecraft. Nanocellulose has good heat resistance and can be used as a heat insulation material after modification to help reduce

As a new material, nanocellulose has excellent mechanical properties and environmental protection characteristics and is gradually being used in the production of plywood. The application of nanocellulose in plywood is mainly manifested in the following aspects: 1. Reinforcement performance: Nanocellulose can be added to the adhesive of plywood as a reinforcement to improve the mechanical properties of plywood, such as strength and durability. The high strength and high modulus properties of nanocellulose enable it to significantly improve the flexural strength, compressive strength, etc. of plywood. 2. Improve adhesion: The nanocellulose has a large surface area and high chemical activity. It can form a good combination with adhesives and wood fibers, enhance the adhesion of plywood and interlayer bonding strength, thereby reducing the plywood during use. stratification phenomenon. 3. Environmental protection performance: Compared with traditional chemical reinforcers, nanocellulose is a natural material that is harmless to the environment. Using nanocellulose in plywood production can reduce the

Nanocellulose and microcrystalline cellulose (MCC) are both derived from natural cellulose, but they are significantly different in structure, preparation method, physical and chemical properties and application fields. The following are the main differences between them: 1. Definition and structure 1. Nanocellulose (Nanocellulose) o Definition: Nanocellulose refers to nano-scale materials composed of cellulose molecules, usually including cellulose nanofiber filaments (CNF) and cellulose nanocrystals (CNC). Its size is generally at the nanometer level, its diameter is usually between a few nanometers and tens of nanometers, and its length can reach several microns or even longer. o Structure: Nanocellulose can be manifested as long fibrous (CNF) or short rod (CNC), with a highly dispersed fibrous structure. It has a higher specific surface

Bacterial Cellulose (BC) is a cellulose material synthesized by bacteria. It has high purity, high crystallinity, high mechanical strength and other characteristics. It is widely used in biomedicine, food, environmental protection and other fields. The following is the preparation process of bacterial cellulose: 1. The preparation process of bacterial cellulose 1. Select bacterial strains to prepare bacterial cellulose The most commonly used strain is Gluconacetobacter xylinus of the genus genus Gluconacetobacter xylinus, because it can be synthesized efficiently. Cellulose. In addition, other bacterial species with cellulose-producing ability can also be used to prepare bacterial cellulose. 2. Preparation of culture medium The synthesis of bacterial cellulose requires abundant nutrients. Commonly used culture medium include HS medium (Hestrin-Schramm medium), and its main components are: o Glucose: As a carbon source, bacterial metabolism produces fibers.

Cellulose Nanofibers (CNF) and Cellulose Nanocrystals (CNC) are both nanoscale derivatives of cellulose, but they have some significant differences in structure, properties and applications. The following are the main differences between them: 1. Structure and morphology 1. Cellulose nanofiber filaments (CNF) o Structure: Cellulose nanofiber filaments are long fibrous nanomaterials composed of cellulose molecular chains. Its structure is usually relatively flexible and long, showing a higher aspect ratio (the ratio of length to diameter). o Morphology: CNF usually exists in fibrous shape, with a diameter ranging from several nanometers to tens of nanometers, and a length of up to several micrometers to tens of micrometers. 2. Cellulose nanocrystals (CNC) o Structure: Cellulose nanocrystals are cellulose nanocrystals obtained by acid hydrolysis, with a more structure

The application of nanocellulose in the petroleum field is gradually attracting attention, mainly because it has the advantages of high strength, low density, good adsorption and biodegradability. The following are some potential applications of nanocellulose in the petroleum industry: 1. Oil well drilling fluid Drilling fluid is a very important material in the oil mining process, and plays a role in cooling, lubrication of drill bits and carrying drill chips. Nanocellulose can be used as an environmentally friendly additive to improve the rheology performance and filtration loss control effect of drilling fluid. Compared with traditional synthetic polymers, nanocellulose has better environmental protection and degradability, which can reduce the impact of drilling fluid on the environment and improve the efficiency of downhole operation. 2. Oil-water separation In the oil-water mixture is a common by-product during oil extraction and production. Nanocellulose can be used to develop efficient oil-water separation materials. Due to its high surface area and good adsorption properties, this type of material can effectively adsorb oil droplets and transfer them to