LiFePO4 wrapped reduced graphene oxide for high performance Li-ion battery electrode

Nagaraju, D. H.; Kuezma, Mirjana; Suresh, G.

doi:10.1007/s10853-015-8976-2

Cited by 26 publications

(10 citation statements)

References 46 publications

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“…The most popular nanomaterials employed for flexible conductive‐wrapping (FCW) is graphene or reduced graphene oxide (rGO) . This strategy has been widely used for especially silicon and sulfur, and also conventional electrode materials, such as LiFePO 4 , LiMnO 2 . Graphene is a 2D atomic film with high conductivities, excellent flexibility and mechanical strength.…”

Section: Controlling Etn In Composite Electrodesmentioning

confidence: 99%

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Wang

Min

et al. 2018

Advanced Materials

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portable electronics, cell phones, electrical vehicles (EVs), aerospace, etc. For advanced batteries, higher and higher energy density and/or power density, long cycling stability, good device safety, and low-cost are the primary goals. Since the energy density is mainly dependent on the specific capacity and loading level of active materials (AMs), AMs usually dominate the volume and weight inside the batteries. Because of this, tremendous efforts have been focused on high-performance AMs. However, the electrochemical performance of energy storage devices (ESDs) is fundamentally determined by a collective contribution or teamwork of all the components: AMs, electrolyte, separator, conductive agent, binders, etc. More importantly, with the increasing interests on high-capacity AMs (e.g., silicon, sulfur, Li-rich cathode, etc.), it becomes very clear that the "traffic system" (i.e., the charge transport system) plays very critical roles in the performance of the high-capacity AMs. Take silicon anode for example, a durable and flexible conductive network inside the electrode composite has been vital for addressing the big volume change issue. In this case, high-performance binders and conductive agent that can generate advanced conductive network are the keys. [2] In addition, with the increasing interests on EVs and flexible electronics, building a powerful and robust charge transport system inside ESDs is an urgent and critical task to support fast charging/ discharging capability and even flexibility of ESDs. In short, with the fast development of energy storage technologies, EVs, cell phones, etc., there is a critical, urgent, and challenging task on building powerful and durable charge transport system in next-generation advanced ESDs. Charge Transport Inside ESDsThe thriving of big cities highly relies on a powerful traffic system that transports the people, foods, products, etc. Similar to this picture, ESDs are powered by the transportation of charges, including both ions and electrons. As illustrated in Figure 1a, one can analogize the charge transport system and AMs in the electrodes of ESDs to the traffic system and buildings (i.e., host system of people), respectively. This analogy example not only help to explain the relationship between The charge transport system in an energy storage device (ESD) fundamentally controls the electrochemical performance and device safety. As the skeleton of the charge transport system, the "traffic" networks connecting the active materials are primary structural factors controlling the transport of ions/electrons. However, with the development of ESDs, it becomes very critical but challenging to build traffic networks with rational structures and mechanical robustness, which can support high energy density, fast charging and discharging capability, cycle stability, safety, and even device flexibility. This is especially true for ESDs with high-capacity active materials (e.g., sulfur and silicon), which show notable volume change during cycling. Therefore, there is an ur...

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Section: Controlling Etn In Composite Electrodesmentioning

confidence: 99%

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Wang

Min

et al. 2018

Advanced Materials

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“…Comprehensive contemporary literature exists exploring the applicability of various types of carbon for use in batteries. Active particles wrapped with graphene or graphene-oxide demonstrated promising results as both cathode 23,24 and anode 25 materials; for example, sulfur particles wrapped with graphene demonstrated outstanding stability for Li-S batteries 26 . Also, N-doped nano-carbons exhibited great potential for application as materials in batteries because of their higher electronic conductivity 20,27–29 .…”

Section: Introductionmentioning

confidence: 99%

Boosting Ultra-Fast Charge Battery Performance: Filling Porous nanoLi4Ti5O12 Particles with 3D Network of N-doped Carbons

Daigle

Asakawa

Beaupré

et al. 2019

Sci Rep

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Lithium titanium oxide (Li4Ti5O12)-based cells are a promising technology for ultra-fast charge-discharge and long life-cycle batteries. However, the surface reactivity of Li4Ti5O12 and lack of electronic conductivity still remains problematic. One of the approaches toward mitigating these problems is the use of carbon-coated particles. In this study, we report the development of an economical, eco-friendly, and scalable method of making a homogenous 3D network coating of N-doped carbons. Our method makes it possible, for the first time, to fill the pores of secondary particles with carbons; we reveal that it is possible to cover each primary nanoparticle. This unique approach permits the creation of lithium-ion batteries with outstanding performances during ultra-fast charging (4C and 10C), and demonstrates an excellent ability to inhibit the degradation of cells over time at 1C and 45 °C. Furthermore, using this method, we can eliminate the addition of conductive carbons during electrode preparation, and significantly increase the energy density (by weight) of the anode.

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“…For instance, Zhang et al [3] synthesized a mesoporous biocarbon nanowire coated LiFePO 4 with high-energy quantum dots by using a highenergy biomolecule ATP in order to improving the electrochemical performance of Li-ion batteries ; this nanostructured LiFePO 4 displayed a high discharge capacity of 197 mAh g À 1 at the C/10 rate, which is higher than the theoretical specific capacity of LiFePO 4 (170 mAh g À1 ). Also, Nagaraju et al [4] fabricated thin sheets of reduced graphene oxide (rGO)wrapped LiFePO 4 composite using a co-precipitation method which shows an enhanced performance compared with the bulk LiFePO 4 . More recently, electrodes composed of Cu have been investigated as cathode materials for Li-ion batteries such as Cu 3 (PO 4 ) 2 , [5] Li 3-x Cu x PO 4 , [6] LiCuPO 4 , [7] etc.…”

Section: Introductionmentioning

confidence: 99%

Sputter‐Deposited Amorphous LiCuPO₄ Thin Film as Cathode Material for Li‐ion Microbatteries

et al. 2018

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We report the electrochemical performance of amorphous LiCuPO4 thin films obtained by radio frequency sputtering as a cathode material for Li‐ion microbatteries. The thin films were characterized by X‐ray diffraction, scanning electron microscopy, profilometry and electrochemical techniques. Charge/discharge profiles and cycling performance were evaluated in lithium electrochemical test cells. Cyclic voltammogram of the LiCuPO4 film shows the typical redox reaction peak at ∼ 1.9 V vs. Li/Li+. A discharge capacity of 160 mAh g−1 (50 μAh cm−2) is attained for the first cycle at C/10 to reach a stable capacity of 70 mAh g−1 (22 μAh cm−2) with good stability over 160 cycles. For comparison, the electrochemical performance of a crystalline LiCuPO4 film was investigated. The first discharge could deliver a high capacity of around 375 mAh g−1 at C/10, but the capacity decayed quickly to a low capacity of 11 mAh g−1 over 50 cycles. The results show that the LiCuPO4 amorphous materials can be considered as the exciting cathode candidate for Li‐ion microbatteries.

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LiFePO4 wrapped reduced graphene oxide for high performance Li-ion battery electrode

Cited by 26 publications

References 46 publications

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Boosting Ultra-Fast Charge Battery Performance: Filling Porous nanoLi4Ti5O12 Particles with 3D Network of N-doped Carbons

Sputter‐Deposited Amorphous LiCuPO₄ Thin Film as Cathode Material for Li‐ion Microbatteries

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LiFePO4 wrapped reduced graphene oxide for high performance Li-ion battery electrode

Cited by 26 publications

References 46 publications

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Boosting Ultra-Fast Charge Battery Performance: Filling Porous nanoLi4Ti5O12 Particles with 3D Network of N-doped Carbons

Sputter‐Deposited Amorphous LiCuPO4 Thin Film as Cathode Material for Li‐ion Microbatteries

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Sputter‐Deposited Amorphous LiCuPO₄ Thin Film as Cathode Material for Li‐ion Microbatteries