Simultaneously improved capacity and initial coulombic efficiency of Li-rich cathode Li[Li0.2Mn0.54Co0.13Ni0.13]O2 by enlarging crystal cell from a nanoplate precursor

Dai, Dongmei; Li, Bao; Tang, Hongwei; Chang, Kun; Jiang, Kai; Chang, Zhaorong; Yuan, Xiao‐Zi

doi:10.1016/j.jpowsour.2016.01.046

Cited by 48 publications

(18 citation statements)

References 32 publications

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“…The capacity of the nanosized particles of Li 2 MnO 3 was also not stable because of structural transformation upon cycling. However, integrated Li 1+ x M 1− x O 2 (M=Mn, Ni, Co, Fe) materials composed of Li 2 MnO 3 and LiMO 2 in nanodomains exhibited specific capacities ≥250 mAh g −1 upon cycling with potentials higher than 4.5 V . This value of capacity is indeed higher than the capacity of commercialized LiCoO 2 (140 mAh g −1 ), LiMn 2 O 4 (120 mAh g −1 ) and LiFePO 4 (160 mAh g −1 ) and so on .…”

Section: Materials For the Positive Electrodementioning

confidence: 90%

From Lithium‐Ion to Sodium‐Ion Batteries: Advantages, Challenges, and Surprises

et al. 2017

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Mobile and stationary energy storage by rechargeable batteries is a topic of broad societal and economical relevance. Lithium-ion battery (LIB) technology is at the forefront of the development, but a massively growing market will likely put severe pressure on resources and supply chains. Recently, sodium-ion batteries (SIBs) have been reconsidered with the aim of providing a lower-cost alternative that is less susceptible to resource and supply risks. On paper, the replacement of lithium by sodium in a battery seems straightforward at first, but unpredictable surprises are often found in practice. What happens when replacing lithium by sodium in electrode reactions? This review provides a state-of-the art overview on the redox behavior of materials when used as electrodes in lithium-ion and sodium-ion batteries, respectively. Advantages and challenges related to the use of sodium instead of lithium are discussed.

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Section: Materials For the Positive Electrodementioning

confidence: 90%

From Lithium‐Ion to Sodium‐Ion Batteries: Advantages, Challenges, and Surprises

et al. 2017

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“…6 shows the initial charge-discharge profiles of the xLi 2 MnO 3 $(1Àx)LiNi 0.7 Co 0.15 Mn 0.15 O 2 (x ¼ 0, 0.03, 0.07, 0.10, 0.20, and 0.30) cathodes cycled in a voltage window of 2.0e4.8 V at C/20 rate. The upper charge cut-off voltage of 4.8 V was chosen to fully activate the Li 2 MnO 3 -like component in all samples to understand its effects on the reversible capacity [29]. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

A facile cathode design combining Ni-rich layered oxides with Li-rich layered oxides for lithium-ion batteries

Song

Yan

et al. 2016

Journal of Power Sources

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h i g h l i g h t s g r a p h i c a l a b s t r a c tA cathode material combining Nirich and Li-rich phase was developed.The existence of Li-rich phase improves the surface chemical stability. Li-rich ordering is observed in layered oxide with Ni-rich (x > 0.5) rather than Mn-rich (y > 0.5). Excellent cycle performance is achieved in both half and pouch-type full cell. a b s t r a c tA facile synthesis method has been developed to prepare xLi 2 MnO 3 $(1Àx)LiNi 0.7 Co 0.15 Mn 0.15 O 2 (x ¼ 0, 0.03, 0.07, 0.10, 0.20, and 0.30) cathode materials, combining the advantages of the high specific capacity of the Ni-rich layered phase and the surface chemical stability of the Li-rich layered phase. X-ray diffraction (XRD), transmission electron microscopy (TEM), and electrochemical charge/discharge measurements confirm the formation of a Li-rich layered phase with C2/m symmetry. The high-angle annular dark-field (HAADF) scanning transmission electron microscopy (STEM) reveals a spatial relationship that the Li-rich nano-domain islands are integrated into the conventional Ni-rich layered matrix (R3m). Most importantly, this is the first time that Li-rich phase has been directly observed inside a particle at the nano-scale, when the overall composition of the layered oxide Li 1þd Ni 1ÀyÀzÀd Mn y M z O 2 (M ¼ metal) is Nirich (>0.5) rather than Mn-rich (>0.5). Remarkably, the xLi 2 MnO 3 $(1Àx)LiNi 0.7 Co 0.15 Mn 0.15 O 2 cathodes with optimized x value shows superior electrochemical performance at C/3 rate: an initial capacity of 190 mA h g À1 with 90% capacity retention after 400 cycles in a half cell and 73.5% capacity retention after 900 cycles in a pouch-type full cell.

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“…Expanding the crystal cell size in the direction of a and b axis can reduce the diffusion resistance of Li-ion when they diffuse from the octahedral site in the transition metal layer to the tetrahedral site in the layer of Liion. [46] High density of stacking faults can be introduced into the Li 2 MnO 3 nanobelts by a low-temperature reduction method to alter the interplanar distances. [47] Similarly, a great number of nanoscale defects, such as twin-orderings and stacking faults, can also be introduced into the lattice of LRMC by the treatment of in-depth chemical de-lithiation.…”

Section: Defective Materials On High-capacity Li-based Batteries 31mentioning

confidence: 99%

“…also play important roles in maintaining the structure stability, promoting ionic/electronic transfer. In LRMC, the diffusion resistance of Li‐ion can be reduced by expanding the crystal cell size, [46] and the spacing between crystal planes can be changed by stacking faults with high density [47] . A large number of nanoscale defects, such as twin‐orderings and stacking faults, produce rich boundaries, which can be used as pins to alleviate structural transformation, suppress voltage attenuation, and improve cycling stability [48] .…”

Section: Classification and Effect Of Defects In High‐capacity Electrmentioning

confidence: 99%

Function and Application of Defect Chemistry in High‐Capacity Electrode Materials for Li‐Based Batteries

Qiao

Lin

Yan

et al. 2020

Chemistry An Asian Journal

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Current commercial Li-based batteries are approaching their energy density limitation, yet still cannot satisfy the energy density demand of the high-end devices. Hence, it is critical to developing advanced electrode materials with high specific capacity. However, these electrode materials are facing challenges of severe structural degradation and fast capacity fading. Among various strategies, constructing defects in electrode materials holds great promise in addressing these issues. Herein, we summarize a series of significant defect engineering in the high-capacity electrode materials for Li-based batteries. The detailed retrospective on defects specification, function mechanism, and corresponding application achievements on these electrodes are discussed from the view of point, line, planar, volume defects. Defect engineering can not only stabilize the structure and enhance electric/ionic conductivity, but also act as active sites to improve the ionic storage and bonding ability of electrode materials to Li metal. We hope this review can spark more perspectives on evaluating high-energydensity Li-based batteries.

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Simultaneously improved capacity and initial coulombic efficiency of Li-rich cathode Li[Li0.2Mn0.54Co0.13Ni0.13]O2 by enlarging crystal cell from a nanoplate precursor

Cited by 48 publications

References 32 publications

From Lithium‐Ion to Sodium‐Ion Batteries: Advantages, Challenges, and Surprises

From Lithium‐Ion to Sodium‐Ion Batteries: Advantages, Challenges, and Surprises

A facile cathode design combining Ni-rich layered oxides with Li-rich layered oxides for lithium-ion batteries

Function and Application of Defect Chemistry in High‐Capacity Electrode Materials for Li‐Based Batteries

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