SKU: 22663287598

Hard carbon paper

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Description

Hard carbon paperProduct Name Name: Hard carbon paper Product Overview Hard carbon refers to carbon that is difficult to graphitize, usually obtained by thermal decomposition of cross linked resins with special structures at around 1000 C Common hard carbons include resin carbon, organic polymer pyrolytic carbon, and carbon black. Hard carbon is also a highly regarded negative electrode material in sodium ion batteries. The negative electrode material of sodium ion

Product Name

Name:Hard carbon paper


Product Overview

 

Hard carbon refers to carbon that is difficult to graphitize, usually obtained by thermal decomposition of cross-linked resins with special structures at around 1000 ¡ãC Common hard carbons include resin carbon, organic polymer pyrolytic carbon, and carbon black. Hard carbon is also a highly regarded negative electrode material in sodium ion batteries. The negative electrode material of sodium ion batteries, as the main body of sodium storage in batteries, plays a decisive role in the development of batteries. Compared with other negative electrode materials for sodium ion batteries, hard carbon has the characteristics of disordered internal crystal arrangement and large interlayer spacing, which enables the hard carbon negative electrode to store more charges at the same volume, improving the energy density and endurance of sodium ion batteries. Meanwhile, due to the larger pore structure of hard carbon, it can accommodate more sodium ions, resulting in more uniform expansion and contraction of the electrode during discharge, which increases its cycling stability, charge discharge performance, and prolongs the cycling life of sodium ion batteries. At present, sodium ion batteries have become a hot topic in research and industrialization both domestically and internationally. With the deepening of related research and the development of technology, the market size of hard carbon negative electrode materials is expected to continue to grow. However, there is still no unified understanding of the sodium storage mechanism of hard carbon, and further research is needed to reveal its structure-activity relationship with electrochemical reaction mechanisms, as well as to explore the influence of physical parameters of hard carbon materials on electrochemical performance.


Technical Parameter

 

Appearance:Black fibrous

Length:100-200μm(SEM)

Diameter:5-20μm(SEM)


Product Features

 

Difficult to graphitize: Even at high temperatures above 2500 ¡ãC it is difficult to graphitize.

Short range carbon layer stacking and long-range disordered structure: During the pyrolysis process, the carbon layer tends to grow in a planar direction, but the cross-linking structure in macromolecules hinders its planar growth. Therefore, the carbon layer in hard carbon cannot infinitely extend and grow into a graphite like layered structure, and can only exhibit a carbon layer stacking structure in the short range, while it remains disordered in the long range. Its structure is mainly composed of amorphous parts, with some carbon layers randomly stacked, resulting in defects and pores, while the other part of the carbon layer has a graphite microcrystalline structure, which has no orientation and is cross-linked with each other.

Large interlayer spacing and more micropores: Compared to graphite, hard carbon has a larger interlayer spacing and more micropores, which allows ions to be quickly inserted and removed. Correspondingly, there are more lithium storage active sites for ion insertion and removal, resulting in a larger specific capacity.

Excellent rate performance: Theoretically, hard carbon materials have good rate performance and can achieve high rate charging and discharging.

Long cycle life: The hard carbon structure is stable and has a long charge discharge cycle life.


Application Fields

 

New energy vehicles: Although there is still room for improvement in energy density and cycle life of sodium ion batteries, their performance indicators such as low temperature, safety, and fast charging are good, and they can be used in some new energy vehicles that do not require extreme endurance;

Large scale energy storage: With the rapid expansion of renewable energy generation such as solar and wind power, the demand for energy storage is also increasing. Sodium ion batteries have certain application prospects in the field of energy storage, and hard carbon as its negative electrode material can help improve the performance of energy storage batteries;

Consumer electronic devices, such as smartphones, tablets, laptops, etc., can meet the requirements of these devices for fast battery charging, safety, and other aspects;

Smart grid: In the smart grid, sodium ion batteries can be used in energy storage systems to help balance supply and demand, improve the stability and reliability of the grid;

Low speed transportation vehicles, such as electric bicycles, electric tricycles, etc., have relatively low requirements for battery weight and volume. Sodium ion batteries can be applied due to their cost advantage.


Related Information

Please e-mail for the detailed characterization data.

E-mail:[email protected]

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SKU: 22663287598

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Verified Purchase
JimXeod
San Leandro, US
★★★★★ 5
Fits perfect and works as designed. Flows like OEM and looks well made.
Style: BE-553B 1-Pack
This filter is very comparable to the stock filter. Fits the BMW G20 just like OEM. I would not say it is two times "heavier" as advertised on the box, but it is very comparable to stock. It's the same weight and similar construction. BMW has a very robust cabin filter. This will be my go to. I did purchase another aftermarket cabin filter that fit well, but was thin, flimsy and had a bad chemical odor. This one is fine and airflow is the same as OEM. I change them every year or so. I don't worry too much about longevity with cabin filters personally.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
S
Verified Purchase
S. Phillips
Pawtucket, US
★★★★★ 4
Good quality but it was slightly longer than original and needed modification.
Style: BE-182 1-Pack
Bought this cabin filter for a 2023 Acura TLX. While the filter seems to be made of quality material, it was just a little too long (about a 1/16 of an inch, so I had to trim it to make it fit so the cover would fit snug. I was able to do that without compromising the filter itself. But this might be an issue for some people
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Reviewed in the United States on May 8, 2026
K
Verified Purchase
Keith Granholm
Charlottesville, US
★★★★★ 5
Fits my Chevy 2021 Bolt Premier perfectly.
Style: BE-966 1-Pack
Installation was a breeze, fir nicely and the air in teh car now smells fresh and clean. The old filter has developed a musty smell so this new one is great. Had it replaced in under 3 minutes.
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Reviewed in the United States on May 18, 2026
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Verified Purchase
Punkizback
West Palm Beach, US
★★★★★ 5
Fits perfectly for my 2017 VW Passat
Style: BE-373 1-Pack, Style: BE-373 1-Pack
Bought this for a fraction of the cost. An auto shop wanted to charge me $72.99 for a filter so I bought this Spearhead brand cabin filter and its the perfect size and its just as sturdy as the previous one the dealership had in the car. Not sure yet how the airflow is or if anything different as I have not driven in the car since it was replaced, but it appears to be a very high quality cabin filter for my car at a great price.
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Reviewed in the United States on May 25, 2026
S
Verified Purchase
SBJ
Louisville, US
★★★★★ 5
Good Quality Replacement for Lexus
Style: BE-285 1-Pack
Was a perfect fit for my 2016 Lexus NX200t. No tools required. Total of 5 minutes to install. Airflow is good after replacement and the activated charcoal seems to make a difference in reducing any smells from outside. Recommended.
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Reviewed in the United States on May 3, 2026

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