Novel design of core shell structure by NCA modification on NCM cathode material to enhance capacity and cycle life for lithium secondary battery

Yoo, Gi-Won; Jang, Byeong-Chan; Son, Jong‐Tae

doi:10.1016/j.ceramint.2014.09.077

Cited by 37 publications

(8 citation statements)

References 10 publications

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“…From the refined results, the gradient buffer has negligible influence on the crystal parameters a and c . Moreover, Figure S3 shows the obvious peak splits of (006)/(012) and (018)/(110), which indicates that CGCS material has an α-NaFeO 2 layered structure with the same structure as NCA and NCM material. − Additionally, the ratio of I (003) / I (104) dramatically exceeds 1.2, indicating that few nickel ions (Ni 2+ ) exist in the lithium layers and occupy the Li site . The powder XRD results show that the obtained CGCS and NCA cathode materials have the perfect layered α-NaFeO 2 structure without any impurity phase.…”

Section: Resultsmentioning

confidence: 97%

High-Thermal- and Air-Stability Cathode Material with Concentration-Gradient Buffer for Li-Ion Batteries

Shi

Zhang

et al. 2017

ACS Appl. Mater. Interfaces

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Delivery of high capacity with high thermal and air stability is a great challenge in the development of Ni-rich layered cathodes for commercialized Li-ion batteries (LIBs). Herein we present a surface concentration-gradient spherical particle with varying elemental composition from the outer end LiNiCoMnO (NCM) to the inner end LiNiCoAlO (NCA). This cathode material with the merit of NCM concentration-gradient protective buffer and the inner NCA core shows high capacity retention of 99.8% after 200 cycles at 0.5 C. Furthermore, this cathode material exhibits much improved thermal and air stability compared with bare NCA. These results provide new insights into the structural design of high-performance cathodes with high energy density, long life span, and storage stability materials for LIBs in the future.

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Section: Resultsmentioning

confidence: 97%

High-Thermal- and Air-Stability Cathode Material with Concentration-Gradient Buffer for Li-Ion Batteries

Shi

Zhang

et al. 2017

ACS Appl. Mater. Interfaces

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“…All of these can prove to be suitable solutions for commuting to work/school in crowded cities, to explore the neighborhood, or any other trips that do not involve carrying heavy baggage. Ito et al [12], Muenzel et al [28] and Yoo et al [29] investigate the dynamics of the propulsion mechanism of a skateboard using computer simulations based on different lithium-ion battery chemistry. Kuleshov [30,31] followed the linear stability of the skateboard-skater system and develop a model of motion.…”

Section: Introductionmentioning

confidence: 99%

Electrical Longboard for Everyday Urban Commuting

et al. 2020

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This paper addresses the possibility of using an electric longboard in daily travel. A conventional longboard was transformed into an electric one and tested in ICSI Rm. Valcea labs. A series of tests were performed both at the laboratory level and, under normal running conditions, outdoors. Nevertheless, two possible scenarios have been taken into consideration. First, when the electric longboard is running on a flat road with a cruise speed, while the second scenario considered was that of climbing a hill with a 10% slope. The results confirmed the expectations and showed that a full charge of the batteries allows a trip over a distance of almost 50 km on a flat route having a consumption of about 10 Wh/km. However, there are some things to keep in mind when making travel distance predictions. The quality and the profile of the road, the weight of the rider, the rider position, all of these are factors which can significantly influence the predictions regarding the travel distance. Moreover, if the optimization is taken into account, several adjustments can be done in choosing the size and wheel model, whether or not to equip the skateboard with suspensions as well as a compromise between power and energy densities when choosing battery type is essential.

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“…Common positive electrode materials such as NCA, NCM, and Li-rich layered materials of Li-ion battery could only exhibit specific capacity of 200 mA h/g and more, which shows a huge gap to reach the target of energy density of 400 W h/kg. 6 Besides, recently, the shortage and fast growing prices of key metals resources, such as cobalt and nickel, indicate that the resources dependency is still one of the main bottlenecks for sustainable development and extensive application of Li-ion secondary battery in the future. The exploitation and smelting of raw metal materials are also energy and time-consuming and need further slag discharge processes.…”

Section: Introductionmentioning

confidence: 99%

“…Because cell voltage of most of the aqueous electrolyte batteries, as is well-known, is less than 1.6 V, the improvement of specific capacity performance of positive electrode materials is an unavoidable task for ultimate improvement of energy density of current secondary batteries. Common positive electrode materials such as NCA, NCM, and Li-rich layered materials of Li-ion battery could only exhibit specific capacity of 200 mA h/g and more, which shows a huge gap to reach the target of energy density of 400 W h/kg . Besides, recently, the shortage and fast growing prices of key metals resources, such as cobalt and nickel, indicate that the resources dependency is still one of the main bottlenecks for sustainable development and extensive application of Li-ion secondary battery in the future.…”

Section: Introductionmentioning

confidence: 99%

New Application of Waste Citrus Maxima Peel-Derived Carbon as an Oxygen Electrode Material for Lithium Oxygen Batteries

Wang

Yao

et al. 2018

ACS Appl. Mater. Interfaces

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Recently, lithium oxygen battery has become a promising candidate to satisfy the current large-energy-storage devices demand because of its amazing theoretical energy density. However, it still faces problems such as poor reversibility and short cycle life. Here, citrus maxima peel (CMP) was used as a precursor to prepare activated and Fe-loading carbon (CMPACs and CMPACs-Fe, respectively) via pyrolysis in nitrogen atmosphere at 900 °C, in which KOH was added as an activator. Electrochemical measurements show that CMPAC-based Li-O battery possesses high specific capacity of 7800 mA h/g, steady cycling performance of 466 cycles with a corresponding Coulombic efficiency of 92.5%, good rate capability, and reversibility. Besides, CMPACs-Fe-based O electrode delivers even lower overpotential in both charge and discharge processes. We conclude that these excellent electrochemical performances of CMPACs and CMPACs-Fe-based O electrode benefit from their cellular porous structure, plenty of active sites, and large specific surface area (900 and 768 m/g), which suggest that these biomass-derived porous carbons might become promising candidates to achieve efficient lithium oxygen battery.

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Novel design of core shell structure by NCA modification on NCM cathode material to enhance capacity and cycle life for lithium secondary battery

Cited by 37 publications

References 10 publications

High-Thermal- and Air-Stability Cathode Material with Concentration-Gradient Buffer for Li-Ion Batteries

High-Thermal- and Air-Stability Cathode Material with Concentration-Gradient Buffer for Li-Ion Batteries

Electrical Longboard for Everyday Urban Commuting

New Application of Waste Citrus Maxima Peel-Derived Carbon as an Oxygen Electrode Material for Lithium Oxygen Batteries

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