Li-rich layered composite Li[Li0.2Ni0.2Mn0.6]O2 synthesized by a novel approach as cathode material for lithium ion battery

Jing, Lin; Mu, Daobin; Jin, Ying; Wu, Borong; Ma, Yunfeng; Wu, Feng

doi:10.1016/j.jpowsour.2012.12.042

Cited by 130 publications

(60 citation statements)

References 30 publications

(14 reference statements)

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“…Fig. 8 shows that the shapes of the CVs and electrochemical reactions of the three samples are in good agreement with previous studies [17,25,36]. In the initial anodic processes of the N-LR-NCM and C-LR-NCM, there are two oxidation peaks at about 4.1 V and 4.6 V. The 4.1 V peak is due to the oxidation process of Ni 2+ /Co 3+ to higher oxidation states.…”

Section: Electrochemical Measurementssupporting

confidence: 88%

Synthesis and electrochemical performance of micro-sized Li-rich layered cathode material for Lithium-ion batteries

Pan

Xia

Qiu

et al. 2016

Electrochimica Acta

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Synthesis and electrochemical performance of micro-sized Li-rich layered cathode material for Lithium-ion batteries, Electrochimica Acta http://dx.(Z. Liu).2 Highlights 1. Micron Li-rich oxides have been synthesized by a new two-step method.2. Micron particles result in high pellet density and good cycling performance.3. High capacity of the micron Li-rich oxide was achieved after Na 2 S 2 O 8 treatment. 3 ABSTRACTLi-rich layered oxides with micro-sized primary particles usually exhibit higher pellet density and better cycling performance. However, it is often at the expense of high reversible capacity. Here, we reported a simple strategy through a new chemical lithiation with micro-sized spinel-precursors and Na 2 S 2 O 8 surface treatment to obtain micro-sized particles in the Li-rich Li 1.172 Ni 0.135 Co 0.135 Mn 0.539 O 2 oxide without compromising its discharge capacity (260 mAh/g at 0.1 C). Benefited from its larger particles and lower specific surface area, the obtained micron Li-rich layered material manifests its higher pellet density (3.18 g/cm 3 ) and better cycling performance in comparison with the nano-sized Li-rich layered material. After 100 cycles at 0.1 C，it can still deliver a capacity of 192 mAh/g with retention of 74 %, much higher than 167 mAh/g with retention of 67 % of the nano-sized sample. Moreover, the micron Li-rich layered material also exhibits good rate performance with a capacity of 174 mAh/g at 2 C benefited from the 3D Li + insertion/extraction channel of its surface spinel content. These results may provide a new insight on improving pellet density of high-performance Li-rich layered cathode materials.

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Section: Electrochemical Measurementssupporting

confidence: 88%

Synthesis and electrochemical performance of micro-sized Li-rich layered cathode material for Lithium-ion batteries

Pan

Xia

Qiu

et al. 2016

Electrochimica Acta

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“…In Equations ( 3) and ( 4) , R , T , n , F , A , C , and σ w are the gas constant, the absolute temperature, the number of electrons per molecule during oxidation, the Faraday's constant, the surface area of the electrode, the Na + concentration in the electrode material, and the Warburg coeffi cient, respectively. [ 42 ] The results are shown in Figure 7 e. Using Equations ( 3) and ( 4) , it can be estimated that the sodium diffusion coeffi cient of the a-SnO 2 /GA is 3.184 × 10 −17 cm 2 s −1 which is almost 3.8 times as much as 8.223 × 10 −18 cm 2 s −1 associated with the c-SnO 2 /GA. The enhanced Na + diffusion coeffi cient of a-SnO 2 /GA may be attributed to the intrinsically isotropic nature of amorphous materials.…”

Section: Wileyonlinelibrarycommentioning

confidence: 94%

Controlled SnO₂ Crystallinity Effectively Dominating Sodium Storage Performance

Fan

Yan

et al. 2016

Advanced Energy Materials

198

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The exploration of sodium ion batteries (SIBs) is a profound challenge due to the rich sodium abundance and limited supply of lithium on earth. Here, amorphous SnO2/graphene aerogel (a‐SnO2/GA) nanocomposites have been successfully synthesized via a hydrothermal method for use as anode materials in SIBs. The designed annealing process produces crystalline SnO2/graphene aerogel (c‐SnO2/GA) nanocomposites. For the first time, the significant effects of SnO2 crystallinity on sodium storage performance are studied in detail. Notably, a‐SnO2/GA is more effective than c‐SnO2/GA in overcoming electrode degradation from large volume changes associated with charge–discharge processes. Surprisingly, the amorphous SnO2 delivers a high specific capacity of 380.2 mAh g−1 after 100 cycles at a current density of 50 mA g−1, which is almost three times as much as for crystalline SnO2 (138.6 mAh g−1). The impressive electrochemical performance of amorphous SnO2 can be attributed to the intrinsic isotropic nature, the enhanced Na+ diffusion coefficient, and the strong interaction between amorphous SnO2 and GA. In addition, amorphous SnO2 particles with the smaller size better function to relieve the volume expansion/shrinkage. This study provides a significant research direction aiming to increase the electrochemical performance of the anode materials used in SIBs.

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“…The phase change also results in a somewhat more complex CEI formation mechanism than that of Ni-rich NMC. 130,131 Strategies to stabilize the surface of Li-rich NMCs include coatings, [132][133][134][135] surface treatments, 126 cycling protocols, 136 synthesis routes, 137,138 and electrolyte additives. 135 Most of these efforts have failed to stop the underlying mechanisms responsible for voltage fade, 135 although compositions that incorporate small amounts of spinel domains into the layered structure show some promise.…”

Section: High-voltage Cathode Materialsmentioning

confidence: 99%

Toward Low-Cost, High-Energy Density, and High-Power Density Lithium-Ion Batteries

Ruther

et al. 2017

JOM

224

136

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Reducing cost and increasing energy density are two barriers for widespread application of lithium-ion batteries in electric vehicles. Although the cost of electric vehicle batteries has been reduced by $70% from 2008 to 2015, the current battery pack cost ($268/kWh in 2015) is still >2 times what the USABC targets ($125/kWh). Even though many advancements in cell chemistry have been realized since the lithium-ion battery was first commercialized in 1991, few major breakthroughs have occurred in the past decade. Therefore, future cost reduction will rely on cell manufacturing and broader market acceptance. This article discusses three major aspects for cost reduction: (1) quality control to minimize scrap rate in cell manufacturing; (2) novel electrode processing and engineering to reduce processing cost and increase energy density and throughputs; and (3) material development and optimization for lithium-ion batteries with high-energy density. Insights on increasing energy and power densities of lithium-ion batteries are also addressed.

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Li-rich layered composite Li[Li0.2Ni0.2Mn0.6]O2 synthesized by a novel approach as cathode material for lithium ion battery

Cited by 130 publications

References 30 publications

Synthesis and electrochemical performance of micro-sized Li-rich layered cathode material for Lithium-ion batteries

Synthesis and electrochemical performance of micro-sized Li-rich layered cathode material for Lithium-ion batteries

Controlled SnO₂ Crystallinity Effectively Dominating Sodium Storage Performance

Toward Low-Cost, High-Energy Density, and High-Power Density Lithium-Ion Batteries

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Li-rich layered composite Li[Li0.2Ni0.2Mn0.6]O2 synthesized by a novel approach as cathode material for lithium ion battery

Cited by 130 publications

References 30 publications

Synthesis and electrochemical performance of micro-sized Li-rich layered cathode material for Lithium-ion batteries

Synthesis and electrochemical performance of micro-sized Li-rich layered cathode material for Lithium-ion batteries

Controlled SnO2 Crystallinity Effectively Dominating Sodium Storage Performance

Toward Low-Cost, High-Energy Density, and High-Power Density Lithium-Ion Batteries

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Product

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Controlled SnO₂ Crystallinity Effectively Dominating Sodium Storage Performance