Effects of Graphene Nanosheets with Different Lateral Sizes as Conductive Additives on the Electrochemical Performance of LiNi0.5Co0.2Mn0.3O2 Cathode Materials for Li Ion Batteries

Hsu, Tzu-Chien; Liu, Wei‐Ren

doi:10.3390/polym12051162

Cited by 8 publications

(5 citation statements)

References 47 publications

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“…This is expected to yield enhanced rate performance. [74] Note that the average sizes of nanoplatelets in the smallest fraction is greater than 60 nm which is large enough to avoid parasitic reactions caused by small particles with high-surface area. [18,23] This nanoplatelet dispersion was mixed with IPA-dispersed SWCNT and vacuum filtered onto Celgard 2320 membranes to produce composite films with 19-21 wt% nanotubes (no polymeric binder), a total (P+SWCNT) mass loading of M T /A = 0.63 mg cm −2 and a thickness of ≈6 µm (Figure 4A, refer to Section 4 for more details).…”

Section: Application As Anodes For Na-ion Batterymentioning

confidence: 99%

Amorphous 2D‐Nanoplatelets of Red Phosphorus Obtained by Liquid‐Phase Exfoliation Yield High Areal Capacity Na‐Ion Battery Anodes

Kaur

Konkena

Gabbett

et al. 2022

Advanced Energy Materials

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The development of sodium ion batteries will require high‐performance electrodes with very large areal capacity and reasonable rate performance. Although red phosphorus is a very promising electrode material, it has not yet fulfilled these requirements. Here, liquid phase exfoliation is used to convert solid red phosphorus into amorphous, quasi‐2D nanoplatelets. These nanoplatelets have lateral sizes of hundreds of nanometers, thickness of 10s of nanometers and are quite stable in ambient conditions, displaying only low levels of oxidation on the nanosheet surface. By solution mixing with carbon nanotubes, these nanoplatelets can be fabricated into nanocomposite battery anodes. After employing an extended activation process, good cycling stability over 1000 cycles and low‐rate capacitances >2000 mAh gP−1 is achieved. Because of the high conductivity and mechanical robustness provided by the nanotube network, it is possible to fabricate very thick electrodes. These electrodes display extremely high areal capacities approaching 10 mAh cm−2 at currents of ≈1 mA cm−2. Detailed analysis shows these electrodes to be limited by solid‐state diffusion such that the thickest electrodes have state‐of‐the‐art rate performance and a near‐optimized combination of capacity and rate performance.

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Section: Application As Anodes For Na-ion Batterymentioning

confidence: 99%

Amorphous 2D‐Nanoplatelets of Red Phosphorus Obtained by Liquid‐Phase Exfoliation Yield High Areal Capacity Na‐Ion Battery Anodes

Kaur

Konkena

Gabbett

et al. 2022

Advanced Energy Materials

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“…Graphene is a powerful planar conductive additive, which is considered to be one of the most promising conductive additives due to its unique physicochemical properties including high aspect ratio, chemical resistance, excellent conductivity, and low dosage of effective characteristics [55][56][57]. Compared with the "point-to-point" contact mode constructed by the traditional graphite conductive agent, graphene can form a "point-to-surface" contact mode with the electrode material in the electrode, providing a long-range and fast conduction path for electrons and Li + , reducing the amount of conductive agent is equivalent to increasing the content of the active material of the electrode and increasing the capacity of the electrode [54,58].…”

Section: Graphene As Libs Electrode Conductive Agentmentioning

confidence: 99%

Application of Graphene in Lithium-Ion Batteries

Qi,

Wang,

et al. 2024

Nanotechnology and Nanomaterials

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Graphene has excellent conductivity, large specific surface area, high thermal conductivity, and sp2 hybridized carbon atomic plane. Because of these properties, graphene has shown great potential as a material for use in lithium-ion batteries (LIBs). One of its main advantages is its excellent electrical conductivity; graphene can be used as a conductive agent of electrode materials to improve the rate and cycle performance of batteries. It has a high surface area-to-volume ratio, which can increase the battery’s energy storage capacities as anode material, and it is highly flexible and can be used as a coating material on the electrodes of the battery to prevent the growth of lithium dendrites, which can cause short circuits and potentially lead to the battery catching fire or exploding. Furthermore, graphene oxide can be used as a binder material in the electrode to improve the mechanical stability and adhesion of the electrodes so as to increase the durability and lifespan of the battery. Overall, graphene has a lot of potential to improve the performance and safety of LIBs, making them a more reliable and efficient energy storage solution; the addition of graphene can greatly improve the performance of LIBs and enhance chemical stability, conductivity, capacity, and safety performance, and greatly enrich the application backgrounds of LIBs.

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“…Nevertheless, it was observed that the experimental results often deviated from the predicted values using Equation (2), and it seemed that a larger size of graphene was not always better. Hsu et al reported the rate performance comparison of the NMC electrodes utilizing graphene in different lateral sizes (13 and 28 µm, denoted as GN-13 and GN-28; the thickness of both graphene nanosheets is similar) as the conductive agents [115]. The specific capacities of 189.2 and 114.2 mA h g −1 at 0.1 C and 2 C, respectively, were achieved with GN-13, which are higher than those with GN-28 (179.4 and 6 mA h g −1 at 0.1 C and 2 C, respectively).…”

Section: Graphene-enhanced Cathode Materials 41 Graphene-enhanced Cathode Materials For Lithium-ion Batteriesmentioning

confidence: 99%

Graphene-Enhanced Battery Components in Rechargeable Lithium-Ion and Lithium Metal Batteries

Chang¹,

Ho²

2021

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Stepping into the 21st century, “graphene fever” swept the world due to the discovery of graphene, made of single-layer carbon atoms with a hexagonal lattice. This wonder material displays impressive material properties, such as its electrical conductivity, thermal conductivity, and mechanical strength, and it also possesses unique optical and magnetic properties. Many researchers see graphene as a game changer for boosting the performance of various applications. Emerging consumer electronics and electric vehicle technologies require advanced battery systems to enhance their portability and driving range, respectively. Therefore, graphene seems to be a great candidate material for application in high-energy-density/high-power-density batteries. The “graphene battery”, combining two Nobel Prize-winning concepts, is also frequently mentioned in the news and articles all over the world. This review paper introduces how graphene can be adopted in Li-ion/Li metal battery components, the designs of graphene-enhanced battery materials, and the role of graphene in different battery applications.

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Effects of Graphene Nanosheets with Different Lateral Sizes as Conductive Additives on the Electrochemical Performance of LiNi0.5Co0.2Mn0.3O2 Cathode Materials for Li Ion Batteries

Cited by 8 publications

References 47 publications

Amorphous 2D‐Nanoplatelets of Red Phosphorus Obtained by Liquid‐Phase Exfoliation Yield High Areal Capacity Na‐Ion Battery Anodes

Amorphous 2D‐Nanoplatelets of Red Phosphorus Obtained by Liquid‐Phase Exfoliation Yield High Areal Capacity Na‐Ion Battery Anodes

Application of Graphene in Lithium-Ion Batteries

Graphene-Enhanced Battery Components in Rechargeable Lithium-Ion and Lithium Metal Batteries

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