A new article in the journal Advanced Science explored the development of a new energy dissipating binder to improve the performance of lithium-ion battery anodes. The research was conducted by scientists from Xi’an Jiaotong University and China University of Geosciences.
Study: An Energy Dissipative Binder for Self-Tuning Silicon Anodes in Lithium-Ion Batteries. Image credit: P5h/Shutterstock.com
Contents
Background to the Research
Lithium-ion batteries are an important green energy storage technology in the 21st century. Together with fuel cells and supercapacitors, they offer the potential to overcome environmental problems caused by over-reliance on fossil fuels and help the world to transition to an emission-free, post-carbon economy.
Among the main components of lithium-ion batteries (and other types of battery technology), the rational design of anodes is critical to ensure their optimal performance. Several materials have been explored for use in battery anodes, with silicon being one of the most promising. This is due to silicon’s high specific capacity at room temperature, low operating voltages, and abundance of features.
Although silicon’s beneficial properties for anode materials are well documented, there are still some major issues that make practical applications even more difficult. These include potential sputtering of silicon particles from extreme and repeated volume changes, mismatched SEIs, loss of electrical contact and the resulting rapid decline in capacity.
Developing highly efficient silicon anodes with optimal stability and lifecycle is a complex task that requires the rational design of the component’s nanostructured architecture. Currently, research has focused on finding suitable electrolytes and binders that can fully exploit the benefits of silicon anodes in batteries. Even a small proportion of the appropriate binder in the electrode can have remarkable results.
The mechanical properties of the binder are fundamental to determine the cyclic stability of silicon anodes and depend on the molecular configuration of the binder, as well as the interactions within the binder network. The network can be modified by various routine approaches to adjust binder properties such as grafting, mixing and crosslinking.
Differently adapted networks produce binders and electrodes with different properties. For example, hard and rigid polymeric networks exhibit greater strength but cannot withstand damage due to their insufficient tenacity, while highly elastic networks can adapt sufficiently to changes in volume but lack the necessary ductility for energy dissipation.
Designing binder networks with the ideal combination of mechanical properties is extremely desirable in this field and therefore requires thorough investigation to improve the performance and commercial viability of silicon anodes.
A particular area of interest today is the rational design of binders, which can improve the self-repairing abilities of silicon anodes. This can be achieved by introducing reversible chemical bonds into the ligand network.
The Study
The article in the journal Advanced Science presents a new multifunctional binder for silicon lithium-ion battery anodes with comprehensive properties. The binder developed in the research is called GCA13. An organic based polymeric binder, it is constructed from guar gum and small molecules of citric acid.
The choice of raw materials allows the co-engineering of the binder for both long and short range effects, the first effect being provided by the polymeric backbone of the guar gum, while the citric acid provides the second. The citric acid molecules are plasticized, increasing the viscoelastic properties of the proposed binder.
The proposed binder overcomes the problems of volume change in silicon anodes, conferring self-adjusting abilities, allowing self-rearrangement in silicon lattices, which means that the electrodes maintain their structural stability during cycling. Consequently, the stability of the electrode interfaces is significantly improved due to the improvements in mechanical properties provided by the GCA13 binder.
During the cycle, any cracks that appear, which would otherwise lead to disintegration of the silicon particles and long-term electrode instability, are healed and the structure is rearranged. A pliable dual-layer solid electrolyte interface is formed, improving the electrode’s energy dissipation performance and imparting superior electrochemical stability.
Excellent capacity retention after 740 cycles has been observed in silicon anodes incorporating GCA13, with extended applications over a wide temperature range from -15 to 60oC.
In Summary
The paper demonstrated the rational design and green synthesis of a new guar gum/citric acid binder for use in silicon anodes to improve their self-setting properties, self-healing properties, and cycle performance. Anodes incorporating the binder GCA13 exhibit remarkable performance over a wide range of operating temperatures.
The authors stated that due to structural and interfacial stabilization, the unique energy-dissipating viscoelastic binder can contribute to the development of advanced, stable and high-performance Li-ion batteries with increased safety and extended life cycles. Furthermore, the sustainability of silicon resources will significantly improve the environmental friendliness of lithium-ion batteries in the future.
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Reference and Further Reading
Tong, Y et al. (2022) An energy dissipative binder for self-adjusting silicon anodes in lithium-ion batteries Advanced Science [online] onlinelibrary.wiley.com. Available in:
https://doi.org/10.1002/advs.20220544
Disclaimer: The views expressed here are those of the author expressed in his private capacity and do not necessarily represent the views of AZoM.com Limited T/A AZoNetwork, owner and operator of this site. This disclaimer forms part of the Terms and Conditions of Use for this website.
Is silicon an anode or cathode?
ESS, backed by Bill Gates – which manufactures giant iron, salt and water batteries – is starting to be negotiated. Battery company ESS went public through a SPAC with Acon S2 Investment Corp.
1 Silicon. Silicon (Si) is one of the most studied anode materials due to its low cost, low electrochemical potential of 0.06 V vs.
Why silicon is used as anode?
What is silicon anode? Silicon anode batteries are an extension of the widely used Lithium Ion (Li-Ion) batteries. First-generation lithium-ion batteries used lithium as the anode material. This was replaced by carbon/graphite after a series of highly publicized overheating and explosion incidents.
Why silicon is added to electrode coating?
Silicon is one of the most promising anode materials for lithium-ion batteries due to advantages including its highest known capacity and relatively low working potential.
Why is silicon anode better than graphite?
Silicon is a promising material as a negative electrode for LIBs. It can store almost 4 mol of Li per mol of Si (Li15Si4), leading to a theoretical volumetric capacity of 2190 mAh Lâ13, which is higher than that of graphite, i.e. 837 mAh Lâ14. Furthermore, Si has a low discharge potential of 0.05 V vs.
Is cobalt an anode or cathode?
With a theoretical capacity of more than 10 times that of graphite, silicon anodes can at least double the capacity of graphite anode batteries.
Is cobalt an anode?
In addition to serving as the cathode material for many lithium-ion batteries, cobalt is also used to make powerful magnets, high-speed cutting tools, and high-strength alloys for jet engines and gas turbines.
Why is cobalt used in cathode?
An integrated porous cobalt/cobalt oxide (Co3O4/CoO/Co) anode was prepared by easy processes, including directional lyophilization of a Co foam and its partial thermal oxidation to Co3O4/CoO, for use as a high capacity anode material for lithium-ion batteries (LIBs).
What part of a battery is cobalt?
The cobalt ensures that the cathodes don’t overheat or catch fire easily and helps extend the battery life that automakers usually guarantee for eight to 10 years.
Can silicon be used as anode?
Cobalt is an essential part of the lithium-ion batteries that give electric vehicles the range and durability consumers need. Most modern electric vehicles use these battery chemistries in lithium-nickel-manganese-cobalt oxide (NMC) batteries that have a cathode containing 10-20% cobalt.
What materials can be used as anode?
Silicon is considered a promising anodic material for lithium-ion batteries due to its record capacity (about 4,000 mAh gâ1), more than ten times greater than that of graphite, used in commercial batteries.
Why is silicon anode better than graphite?
Metals such as zinc and lithium are often used as anode materials.
What is the company that makes the Forever battery?
With a theoretical capacity of more than 10 times that of graphite, silicon anodes can at least double the capacity of graphite anode batteries.
Thus, QuantumScape has addressed the two biggest shortcomings of solid-state battery chemistry. And it’s positioned to create a new class of EV batteries that are much cheaper, last much longer and charge much faster than traditional Li-Ion.
Is QuantumScape making the Forever battery?
What is battery ticker forever? 1 Answer. FREYR Battery (FREY) Stock Quotes, News, Quotes & History – Yahoo Finance. Anonymous 1 month ago.
What is the forever battery Stock called?
At the end of 2021, QuantumScape illustrated that its battery forever functioned in 4-layer formats with up to 800 charge cycles. A quarter later, the company scaled the successful results to 10-layer batteries of up to 800 cycles.
Does QuantumScape have a future?
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What makes a good anode material?
QuantumScape’s future promises The German auto giant hopes to start producing lithium-metal battery-powered EVs from its production line from 2025. Volkswagen has also set an ambitious roadmap for nearly 70 new electric models by 2028, with 22 million EVs delivered.
Good anode materials These include zinc, lithium, graphite or platinum. A good anode should be an efficient reducing agent, have good conductivity, stability and a high coulombic output (the output of electrical energy).
What is the best anode for electrolysis?
What is the most common anode material? Currently, the two most commonly used anode materials are those based on carbon (graphite) and lithium alloy metals.
What is the best anode and cathode for electrolysis of water?
Iron and steel are most commonly used for water electrolysis. They are used as anodes but are sacrificed during electrolysis as anodes rust (oxidize) and cathodes rust (reduce).
What is the best metal to use for electrolysis?
Steel and iron are most commonly used for water electrolysis. These electrodes are used as the anode and are sacrificed in electrolysis as the anode rusts (becomes oxidized) and the cathode rusts (becomes reduced).
What is the best electrolyte for electrolysis?
Iron and steel are most commonly used for water electrolysis.
How do you choose an anode material?
In general, an aqueous solution of potassium or caustic soda is used as the electrolyte for the electrolysis of water.
- Which metal should I choose?
- Saltwater: Aluminum anodes are more active, protect better and last longer than zinc anodes in saltwater – a win-win situation. 🇧🇷
- Brackish Water: Aluminum anodes provide superior protection here. 🇧🇷
Does it matter what metal is used for the anode?
Fresh water: Magnesium is the clear anode of choice.
Is zinc or aluminum a better anode?
A sacrificial anode is made from a metal alloy that has a more “active” voltage (ie, more negative electrochemical potential) than the metal it will protect. The metals used for anodes are chosen because they oxidize more easily than the metals used for the frame.
How do you select an anode?
The anode surface corrodes more evenly: zinc anodes tend to dissolve more evenly and completely; while typical aluminum anodes erode unevenly with visible “craters”.
Which of the following materials is best used for an anode?
The one with the highest reduction potential will be the one you want to select as the reduction half-reaction and therefore will be your cathode. The one with the lowest reduction potential will be the one you want to select as the oxidation half-reaction and therefore will be your anode.
Which of the following materials is used for the cathode?
Metals such as zinc and lithium are often used as anode materials.
What material is the anode?
The cathode materials are composed of cobalt, nickel and manganese in the crystalline structure forming a multimetallic oxide material to which lithium is added.
What material is best for an anode?
Anode materials usually consist of iron, carbon steel or cast iron.
Why is silicon anode better than graphite?
Magnesium anodes are the most active and are the only anodes that work well in the low conductivity of fresh water. Magnesium is also relatively non-toxic to aquatic life.
With a theoretical capacity of more than 10 times that of graphite, silicon anodes can at least double the capacity of graphite anode batteries.
Is graphite a good anode?
What is the disadvantage of using graphite as the anode in a battery? Graphite-based anode materials undergo electrochemical reactions, along with mechanical degradation during battery operation, can dramatically affect or deteriorate the performance of Li-ion batteries and even lead to battery failure in electric vehicles.
Why is graphite used as an anode?
Graphite is a perfect anode and has dominated anode materials since the birth of Li-ion batteries, benefiting from its unrivaled balance of relatively low cost, abundance, high energy density, power density and very short cycle life. far away.
Is graphite an anode or cathode?
Graphite is suitable for cathodic protection anodes due to its chemical inertness, good electrical conductivity and affordable cost. For these reasons, graphite anodes are used in underground pipelines and storage tanks as an economical method of corrosion control.
Is silicon better than graphite?
A key component of lithium-ion batteries is graphite, the primary material used for one of two electrodes known as the anode.
Is silicon better than lithium?
Silicon-based materials usually also have a much higher specific capacity. For example, pure silicon has a capacity of 3600 mAh/g, while graphite is limited to a maximum theoretical capacity of 372 mAh/g.
What is the major disadvantage in using silicon instead of graphite?
The Silicon Difference Silicon has long been attractive for use as a material in lithium-ion battery anodes because its energy capacity is up to 10 times that of the commonly used material, graphite, leading to lithium-ion batteries. with 20 at a 40% higher energy density”, explains the PNNL.
Why is graphite a good anode?
However, its high volume change is a major drawback when using pure silicon as the active anode material. The volume change is as high as ~300% between full delithion and lithiation, which is much greater than the ~10% volume change for graphite 7 and can lead to “breakage” of the silicon electrodes.
Why is silicon anode better?
Graphite is the perfect material for the anode. This has the following advantages: higher cycle stability, better performance during fast charging and higher quality consistency compared to other battery types (such as lead-acid batteries). The purer the graphite, the better this mechanism works.
Is silicon better than lithium?
Silicon is one of the most promising anode materials for lithium-ion batteries due to advantages including its highest known capacity and relatively low working potential.
What is the best material for a cathode?
The Silicon Difference Silicon has long been attractive for use as a material in lithium-ion battery anodes because its energy capacity is up to 10 times that of the commonly used material, graphite, leading to lithium-ion batteries. with 20 at a 40% higher energy density”, explains the PNNL.
Why is silicon a good anode?
Good Cathode Materials Metal oxides are excellent cathode materials because they also have a useful working voltage. These include copper oxide, lithium oxide and graph oxide.
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