Study on Li de-intercalation/intercalation mechanism for a high capacity layered Li1.20Ni0.17Co0.10Mn0.53O2 material

Kobayashi, Hironori; Takenaka, Y.; Arachi, Yoshinori; Nitani, Hiroaki; Okumura, Toyoki; Shikano, Masahiro; Kageyama, Hiroyuki; Tatsumi, Kuniaki

doi:10.1016/j.ssi.2012.02.047

Cited by 12 publications

(16 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the oxidation state was found to be invariant during the initial charge, which is confirmation for the proposed decomposition of Li 2 MnO 3 -like domains to electroactive "MnO 2 " [Reaction (2)]. [1,6,7,11,12] The observed structural disorder around manganese, which increases upon first charge and remains higher after first charge, is in a good agreement with this. [48] Accordingly, only oxygen oxidation can be the origin for the observed initial charge capacity, which is in good accordance with several works and theoretical calculations.…”

Section: Xanes Of Mnsupporting

confidence: 81%

“…[1,13,49] Although, some doubts about the mechanism still exist in terms of how oxygen and the different anionic oxygen species might be built and released; [7,15,49] there are basically only two possibilities on how they might react further, when not taking into account the reversible redox process. In fact, this implies that the activation of the Li 2 MnO 3 -like component is accompanied with the formation and release of an active oxygen species.…”

Section: Reduction Of Co and Ni During Initial Chargementioning

confidence: 99%

“…These latter compounds can further lead to the partial reduction of transition metals, which are high in energy (e.g. [6][7][8] ChemElectroChem 2015, 2, 85 -97 www.chemelectrochem.org [14] The other possibility might be a partial direct reduction process occurring via an electron transfer from the reactive anionic oxygen species towards highly oxidized transition metals such as Ni 4 + and Co 4 + .…”

Section: Reduction Of Co and Ni During Initial Chargementioning

confidence: 99%

“…However, the occurrence of an initial activation process during the first delithiation step is always accompanied with large irreversibility in terms of capacity. [1,6,7,11,12] Initially, the simultaneous release of lithium cations and oxygen leading to the formal loss of lithium oxide has been proposed. graphite), owing to the well-known solid-electrolyte interface formation, a deeper understanding of the initial activation and the following delithiation-lithiation process is cru-cial to develop the correct strategies for countering this problem.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

X‐ray Absorption Spectroscopy Investigation of Lithium‐Rich, Cobalt‐Poor Layered‐Oxide Cathode Material with High Capacity

Buchholz

Li²,

Passerini

et al. 2014

ChemElectroChem

View full text Add to dashboard Cite

We present an ex situ X‐ray absorption spectroscopy investigation into lithiation–delithiation of the lithium‐rich, but cobalt‐poor cathode material Li[Li0.2Ni0.16Mn0.56Co0.08]O2. The main focus of this work is to address the role of manganese and oxygen in the electrochemical redox process and, especially, to identify the phenomena occurring during the initial activation, that is, during the first delithiation–lithiation cycle. Although manganese is not taking part in the initial electrochemical oxidation process, the results indicate that complete Ni2+/Ni4+ and partial Co3+/Co4+ redox processes occur. The electrochemical performance of the material, considering the full and partial redox inactivity of Mn and Co, reveals the participation of oxygen in the overall electrochemical redox process. Finally, it is found, surprisingly, that a partial reduction of Co and Ni takes place at the end of the initial activation.

show abstract

Section: Xanes Of Mnsupporting

confidence: 81%

Section: Reduction Of Co and Ni During Initial Chargementioning

confidence: 99%

Section: Reduction Of Co and Ni During Initial Chargementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

X‐ray Absorption Spectroscopy Investigation of Lithium‐Rich, Cobalt‐Poor Layered‐Oxide Cathode Material with High Capacity

Buchholz

Li²,

Passerini

et al. 2014

ChemElectroChem

View full text Add to dashboard Cite

show abstract

“…Additionally, lattice parameters are known to be an important factor in Li + mobility in these layered structures 7,8 . Therefore, modifying the morphology and controlling the lattice parameters of a material is a reasonable strategy towards improving the rate capability of a battery.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic-assisted co-precipitation to synthesize lithium-rich cathode Li1.3Ni0.21Mn0.64O2+ materials for lithium-ion batteries

Song

Zhang

et al. 2014

Journal of Power Sources

View full text Add to dashboard Cite

Lithium-rich, composite-layered, transition metal oxides have been intensively investigated recently. However, poor rate capability has severely hindered the commercial development of these materials. We produce nanoscale hydroxide precursors for these cathodes using ultrasonic-assisted co-precipitation. The ultrasonic irradiation of a liquid leads to the generation of a cavitation phenomenon comprised of unique reaction fields, which assists in the synthesis of nanoparticle materials. This is confirmed by scanning and transmission electron microscopy. X-ray diffraction and Rietveld refinement results indicate that the ultrasonic-assisted Li 1.3 Ni 0.21 Mn 0.64 O 2+d material has a larger lithium slab space. Electrochemical studies indicate that the ultrasonic-assisted material exhibits a higher initial discharge capacity (251.2 mAh g -1 at 0.1 C) and better cycling performance (200.4 mAh g -1 after 50 cycles) compared with the material synthesized using traditional co-precipitation.Surprisingly, the ultrasonic-assisted material has a stable capacity of 140 mAh g -1 at 5 C and 115 mAh g -1 at 10 C after 50 cycles. First-principles calculations are used to confirm that the specific lattice structure leads to a faster lithium-ion mobility speed.

show abstract

Lithium‐ and Manganese‐Rich Oxide Cathode Materials for High‐Energy Lithium Ion Batteries

Wang¹,

Paillard

et al. 2016

Advanced Energy Materials

244

159

View full text Add to dashboard Cite

Layered lithium‐ and manganese‐rich oxides (LMROs), described as xLi2MnO3·(1–x)LiMO2 or Li1+yM1–yO2 (M = Mn, Ni, Co, etc., 0 < x <1, 0 < y ≤ 0.33), have attracted much attention as cathode materials for lithium ion batteries in recent years. They exhibit very promising capacities, up to above 300 mA h g−1, due to transition metal redox reactions and unconventional oxygen anion redox reaction. However, they suffer from structural degradation and severe voltage fade (i.e., decreasing energy storage) upon cycling, which are plaguing their practical application. Thus, this review will aim to describe the pristine structure, high‐capacity mechanisms and structure evolutions of LMROs. Also, recent progress associated with understanding and mitigating the voltage decay of LMROs will be discussed. Several approaches to solve this problem, such as adjusting cycling voltage window and chemical composition, optimizing synthesis strategy, controlling morphology, doping, surface modification, constructing core‐shell and layered‐spinel hetero structures, are described in detail.

show abstract

Study on Li de-intercalation/intercalation mechanism for a high capacity layered Li1.20Ni0.17Co0.10Mn0.53O2 material

Cited by 12 publications

References 19 publications

X‐ray Absorption Spectroscopy Investigation of Lithium‐Rich, Cobalt‐Poor Layered‐Oxide Cathode Material with High Capacity

X‐ray Absorption Spectroscopy Investigation of Lithium‐Rich, Cobalt‐Poor Layered‐Oxide Cathode Material with High Capacity

Ultrasonic-assisted co-precipitation to synthesize lithium-rich cathode Li1.3Ni0.21Mn0.64O2+ materials for lithium-ion batteries

Lithium‐ and Manganese‐Rich Oxide Cathode Materials for High‐Energy Lithium Ion Batteries

Contact Info

Product

Resources

About