High-energy-density lithium-ion battery using a carbon-nanotube–Si composite anode and a compositionally graded Li[Ni0.85Co0.05Mn0.10]O2 cathode

Lee, Joo Hyeong; Yoon, Chong Seung; Hwang, Jang Yeon; Kim, Sung Jin; Maglia, Filippo; Lamp, Peter; Myung, Seung‐Taek; Sun, Yang Kook

doi:10.1039/c6ee01134a

Cited by 278 publications

(175 citation statements)

References 33 publications

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“…[101][102][103][104] The smooth concentration gradient at the cathode inside maximized the nickel concentration to achieve the high reversible capacity. By contrast, the thermal stability was ensured by the steep concentration gradient of manganese elements at the cathode surface.…”

Section: Concentration Gradientmentioning

confidence: 99%

“…Representative approaches include the doping, [86][87][88][89][90][91][92][93][94][95][96][97][98] morphological control of the primary particle, [99][100][101][102][103][104] the cathode surface modification, [105][106][107][108][109][110] and the primary particle coating, [35,37,[111][112][113][114][115][116][117][118][119][120][121][122][123][124][125][126] which will be discussed below.…”

Section: Strategies To Realize Commercializationmentioning

confidence: 99%

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Prospect and Reality of Ni‐Rich Cathode for Commercialization

Kim

Lee

Cha

et al. 2017

Advanced Energy Materials

665

582

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practical candidate for the wide application of the LIBs with respect to the reversible capacity, rate capability, and capital cost. [4][5][6][7] In terms of nickel contents, the nickel-rich cathodes with nickel content above 80% have advantages in gravimetric capacity, allowing high gravimetric energy density, compared with the nickel content less than 80%. Currently, the nickel-rich cathodes with the amount of nickel less than 60% are fully commercialized. However, the nickel-rich cathodes with nickel content of ≥80% still have many difficulties in the commercialization with respect to powder properties and electrode fabrication process.The unstable powder properties originate from residual lithium compounds such as LiOH and Li 2 CO 3 that formed by the spontaneous reduction of sensitive trivalent nickel ions during the synthesis process and storage in air. [8][9][10][11] The Li 2 CO 3 significantly promotes the gas evolution and increase the moisture of the cathode powder, which strongly related to the safety issue. [12][13][14] Furthermore, the LiOH on the cathode increases the powder pH value, causing the gelation of the slurry during the electrode fabrication process. The nickel-rich cathode with nickel content of ≤60% have acceptable amount of residual lithium compounds for the practical use. By contrast, the cathode with amount of nickel of ≥80% should be treated by additional process to reduce the residual lithium compounds ( Table 1). Furthermore, other powder properties, such as powder pH and moisture, should be carefully controlled when nickel contents were exceeded of ≥80%. Thus, for the practical application of these cathode materials, most battery companies have adapted the washing process, in which the cathode power was stirred in purified water for 20-40 min. [15,16] The washing process could greatly reduce the residual lithium compounds and powder pH value. [15] However, the washing process not only increases process time and capital cost but also make the nickel-rich cathode more chemically sensitive than nonwashed cathodes. [16] More seriously, the water washing deteriorates the thermal stability of the nickel-rich cathodes, indicating that the washing process should be substituted by other methods for the battery safety.Another important factor for the commercialization of the nickel-rich cathodes is the electrode density directly related to the energy density. In general, the nickel-rich cathodesThe layered nickel-rich cathode materials are considered as promising cathode materials for lithium-ion batteries (LIBs) due to their high reversible capacity and low cost. However, several significant challenges, such as the unstable powder properties and limited electrode density, hindered the practical application of the nickel-rich cathode materials with the nickel content over 80%. Herein, important stability issues and in-depth understanding of the nickel-rich cathode materials on the basis of the industrial electrode fabrication condition for the commercialization of the nickel-rich cathode m...

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Section: Concentration Gradientmentioning

confidence: 99%

Section: Strategies To Realize Commercializationmentioning

confidence: 99%

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Kim

Lee

Cha

et al. 2017

Advanced Energy Materials

665

582

View full text Add to dashboard Cite

show abstract

“…[7,8] On the other hand, recent research has been focused on lowcost layered-structure Ni-rich (NRO) and Li-rich (LRO) oxides because of their high discharge capacity values (when compared to LCO) of ≈220 and ≈300 mAh g −1 , respectively. [12][13][14] Whereas, LRO materials are affected by low initial Coulombic efficiency, oxygen evolution at the first charge, unwanted side reactions with the electrolyte on the surface, low tap density, and capacity and voltage drops in the course of cycling and under high current operations. [12][13][14] Whereas, LRO materials are affected by low initial Coulombic efficiency, oxygen evolution at the first charge, unwanted side reactions with the electrolyte on the surface, low tap density, and capacity and voltage drops in the course of cycling and under high current operations.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Cathode Surface Coating Technology for High‐Energy Lithium‐ion and Beyond‐Lithium‐ion Batteries

et al. 2017

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Cathode material degradation during cycling is one of the key obstacles to upgrading lithium-ion and beyond-lithium-ion batteries for high-energy and varied-temperature applications. Herein, we highlight recent progress in material surface-coating as the foremost solution to resist the surface phase-transitions and cracking in cathode particles in mono-valent (Li, Na, K) and multi-valent (Mg, Ca, Al) ion batteries under high-voltage and varied-temperature conditions. Importantly, we shed light on the future of materials surface-coating technology with possible research directions. In this regard, we provide our viewpoint on a novel hybrid surface-coating strategy, which has been successfully evaluated in LiCoO -based-Li-ion cells under adverse conditions with industrial specifications for customer-demanding applications. The proposed coating strategy includes a first surface-coating of the as-prepared cathode powders (by sol-gel) and then an ultra-thin ceramic-oxide coating on their electrodes (by atomic-layer deposition). What makes it appealing for industry applications is that such a coating strategy can effectively maintain the integrity of materials under electro-mechanical stress, at the cathode particle and electrode- levels. Furthermore, it leads to improved energy-density and voltage retention at 4.55 V and 45 °C with highly loaded electrodes (≈24 mg.cm ). Finally, the development of this coating technology for beyond-lithium-ion batteries could be a major research challenge, but one that is viable.

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“…3 In addition, N doping into carbon material networks facilitates the formation of stronger interactions between Li ions and N-doped carbon. 13 Based on the abovementioned advantages, two effective strategies, including the post-treatment of carbon sources with nitrogencontaining chemical agents 9,14,15 and in situ doping using nitrogen-containing precursors, have been developed to construct N-doped carbon materials. [16][17][18] Among both the abovementioned methods, considerable work has proven that the in situ doping method is superior as it can enhance the nitrogen content and avoid the generation of oxygen-bearing group in the nal N-doped carbon materials.…”

Section: 12mentioning

confidence: 99%

“…[3][4][5] Taking into consideration their broad range of applications, the most challenging work for scientists is to further explore and develop advanced electrode materials with high power density, excellent rate capability, prolonged cycle life, and portable safety features for LIBs and supercapacitors. [6][7][8][9] As is known, the inherit nature of electrode materials is crucial for the electrochemical performance of energy storage devices, and carbon materials have continually attracted signicant attention due to their natural abundance, chemical stability, and environmentally friendly properties. However, they are far from meeting the ever-growing requirements for the next-generation electrode materials because of their low theoretical gravimetric capacity (372 mA h g À1 ).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-doped carbon composites derived from 7,7,8,8-tetracyanoquinodimethane-based metal–organic frameworks for supercapacitors and lithium-ion batteries

Tong

Wang

et al. 2017

RSC Adv.

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In this study, nitrogen-doped carbon composites were prepared by carbonizing 7,7,8,8-tetracyanoquinodimethane (TCNQ)-based metal-organic frameworks (MOFs) under a N 2 atmosphere.The TCNQ ligand and pyrolysis temperature played key roles in the formation of these N-doped carbon composities with various nitrogen contents and species, which can effectively adjust the electrochemical performances of electrode materials. The results showed that the nitrogen-doped carbon composites prepared via carbonization at 650 C (N-C-650), as the electrode material for supercapacitors, exhibited high capacitance of 223.7 F g À1 at a current density of 1 A g À1 , and the specific capacitance retained 73.4% of its initial capacitance after 3000 cycles. Moreover, the nitrogen-doped carbon composites prepared via carbonization at 550 C (N-C-550), as the anode material for lithium-ion batteries, exhibited a high reversible capacity of 675 mA h g À1 at a rate of 100 mA g À1 and excellent cycling stability (736.8 mA h g À1 after 50 cycles). The good electrochemical performance of the electrode materials was mainly attributed to the high nitrogen content and control over the type of nitrogen species in the nitrogen-doped carbon composites.

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High-energy-density lithium-ion battery using a carbon-nanotube–Si composite anode and a compositionally graded Li[Ni_0.85Co_0.05Mn_0.10]O₂ cathode

Abstract: A Li-rechargeable battery system based on state-of-the-art cathode and anode technologies demonstrated high energy density, meeting demands for vehicle application.

Cited by 278 publications

References 33 publications

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Feasibility of Cathode Surface Coating Technology for High‐Energy Lithium‐ion and Beyond‐Lithium‐ion Batteries

Nitrogen-doped carbon composites derived from 7,7,8,8-tetracyanoquinodimethane-based metal–organic frameworks for supercapacitors and lithium-ion batteries

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