Study of the Capacity Fading Mechanism for Fe-Substituted LiCoO[sub 2] Positive Electrode

McLaren, Victoria L.; West, Anthony R.; Tabuchi, Mitsuharu; Nakashima, Akiko; Takahara, Hikari; Kobayashi, Hironori; Sakaebe, Hikarí; Kageyama, Hiroyuki; Hirano, Atsushi; Takeda, Yasuo

doi:10.1149/1.1688796

Cited by 32 publications

(28 citation statements)

References 30 publications

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“…Owing to that Fe 3+ are energetically stable at tetrahedral sites, Fe 3+ could easily migrate to the face-shared sites, which is similar to LiCo x Fe 1−x O 2 . [53] The solid-state diffusion of Na + are thus blocked, inducing degradation of electrode properties. Lee et al [45] found that Jahn-Teller-active Fe 4+ in the desodiate Na 1−x FeO 2 were not stable with more than 20% of Fe 4+ species spontaneously reduced to Fe 3+ states by the electrolyte during open-circuit storage of the charged cell.…”

Section: Single-metal-based Oxides Peculiar To Sibsmentioning

confidence: 99%

“…When Na + are extracted from the NaFeO 2 crystal lattice, vacancies are created at face‐shared tetrahedral sites with FeO 6 octahedra. Owing to that Fe 3+ are energetically stable at tetrahedral sites, Fe 3+ could easily migrate to the face‐shared sites, which is similar to LiCo x Fe 1− x O 2 . The solid‐state diffusion of Na + are thus blocked, inducing degradation of electrode properties.…”

Section: Layered Transition Metal Oxidesmentioning

confidence: 99%

See 1 more Smart Citation

Layered Oxide Cathodes for Sodium‐Ion Batteries: Phase Transition, Air Stability, and Performance

Wang

You

Yin

et al. 2017

Advanced Energy Materials

619

464

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sources into large-scale grids, inexpensive, efficient, and fast-responding electrical energy storage (EES) systems are essential to store the off-peak energy and releasing the stored energy during the onpeak period. Among various EES systems, rechargeable batteries represent one of the most competitive technologies because of their high conversion efficiency and environmental friendliness. [1][2][3][4] For stationary EES systems, batteries with low cost, high safety, high rate capability, and long cycle stability are highly desired.Lithium (Li)-ion batteries (LIBs) have achieved great success in the market of portable electronics and electric vehicles since their commercialization by Sony Company in 1991. However, the shortage of Li resources in nature gives rise to a concern about its sustainable development in grid scale. Compared with Li, sodium resource has rich natural abundance in the earth crust and a worldwide distribution, consequently leading to a low price of sodium-based raw materials (e.g., the cost of Na 2 CO 3 is about 25-30 times lower than that of Li 2 CO 3 ). Besides, sodium has a suitable redox potential (E 0 (Na + /Na) = −2.71 V versus standard hydrogen electrode (SHE), 0.3 V above that of Li + /Li) and similar physical and chemical properties with lithium. [5,6] Therefore, rechargeable sodium-ion batteries (SIBs), which have a similar "rockingchair" working principle of LIBs, are emerging as an appealing choice as alternatives for LIBs. Note that it is difficult for SIBs to bypass LIBs in terms of energy densities because of the much higher weight of Na and lower standard electrochemical potential. [7][8][9][10] Nevertheless, the use of low-cost materials, including inexpensive Na-based raw materials and Al current collectors for both cathodes and anodes in SIBs, could significantly reduce the cost. In this case, SIBs could be applied where cost-effectiveness rather than energy density is the most critical issue, e.g., in the field of large-scale EES. As a result, sodiumbased electroactive materials are enjoying renewed interest especially for very low cost systems for grid storage. [11,12] Given that cathode materials are the key component that determines energy density and cost, tremendous efforts have been devoted to exploring suitable positive electrode materials with high reversible capacity, rapid Na ions insertion/extraction, and good cycling stability in the past few years. [13,14] A broad range of compounds, including layered oxides, polyanionic frameworks, hexacyanoferrates, and organics, haveThe increasing demand for replacing conventional fossil fuels with clean energy or economical and sustainable energy storage drives better battery research today. Sodium-ion batteries (SIBs) are considered as a promising alternative for grid-scale storage applications due to their similar "rockingchair" sodium storage mechanism to lithium-ion batteries, the natural abundance, and the low cost of Na resources. Searching for appropriate electrode materials with acceptable electrochemical perfor...

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Section: Single-metal-based Oxides Peculiar To Sibsmentioning

confidence: 99%

Section: Layered Transition Metal Oxidesmentioning

confidence: 99%

Layered Oxide Cathodes for Sodium‐Ion Batteries: Phase Transition, Air Stability, and Performance

Wang

You

Yin

et al. 2017

Advanced Energy Materials

619

464

View full text Add to dashboard Cite

show abstract

“…When sodium ions are extracted from the crystal lattice, vacancies are created at tetrahedral sites that are face-shared with FeO 6 octahedra. Because trivalent iron ions are energetically stabilized at tetrahedral sites, iron ions easily migrate to the face-shared sites, similar to LiCo x Fe 1 − x O 2 [43]. Solid-state diffusion of sodium ions is easily disturbed by iron at tetrahedral sites, leading to the degradation of electrode properties.…”

Section: Layered Oxides As Na Insertion Host Materialsmentioning

confidence: 99%

Recent research progress on iron- and manganese-based positive electrode materials for rechargeable sodium batteries

Yabuuchi

Komaba

2014

Science and Technology of Advanced Materials

216

156

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Large-scale high-energy batteries with electrode materials made from the Earth-abundant elements are needed to achieve sustainable energy development. On the basis of material abundance, rechargeable sodium batteries with iron- and manganese-based positive electrode materials are the ideal candidates for large-scale batteries. In this review, iron- and manganese-based electrode materials, oxides, phosphates, fluorides, etc, as positive electrodes for rechargeable sodium batteries are reviewed. Iron and manganese compounds with sodium ions provide high structural flexibility. Two layered polymorphs, O3- and P2-type layered structures, show different electrode performance in Na cells related to the different phase transition and sodium migration processes on sodium extraction/insertion. Similar to layered oxides, iron/manganese phosphates and pyrophosphates also provide the different framework structures, which are used as sodium insertion host materials. Electrode performance and reaction mechanisms of the iron- and manganese-based electrode materials in Na cells are described and the similarities and differences with lithium counterparts are also discussed. Together with these results, the possibility of the high-energy battery system with electrode materials made from only Earth-abundant elements is reviewed.

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“…By contrast, and with only rare exceptions in the last 20 years, 'routine' hard x-ray XAFS [49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64] and high-resolution XES [65][66][67][68][69][70] can only be performed at the synchrotron light sources.…”

Section: Introductionmentioning

confidence: 99%

A laboratory-based hard x-ray monochromator for high-resolution x-ray emission spectroscopy and x-ray absorption near edge structure measurements

Seidler

Mortensen

Remesnik

et al. 2014

Review of Scientific Instruments

140

160

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We report the development of a laboratory-based Rowland-circle monochromator that incorporates a low power x-ray (bremsstrahlung) tube source, a spherically-bent crystal analyzer (SBCA), and an energy-resolving solid-state detector. This relatively inexpensive, introductory level instrument achieves 1-eV energy resolution for photon energies of ~5 keV to ~10 keV while also demonstrating a net efficiency previously seen only in laboratory monochromators having much coarser energy resolution. Despite the use of only a compact, air-cooled 10 W xray tube, we find count rates for nonresonant x-ray emission spectroscopy (XES) comparable to those achieved at monochromatized spectroscopy beamlines at synchrotron light sources. For xray absorption near edge structure (XANES), the monochromatized flux is small (due to the use of a low-powered x-ray generator) but still useful for routine transmission-mode studies of concentrated samples. These results indicate that upgrading to a standard commercial highpower line-focused x-ray tube or rotating anode x-ray generator would result in monochromatized fluxes of order 10 6 -10 7 photons/s with no loss in energy resolution. This work establishes core technical capabilities for a rejuvenation of laboratory-based hard x-ray spectroscopies that could have special relevance for contemporary research on catalytic or electrical energy storage systems using transition-metal, lanthanide or noble-metal active species.

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Study of the Capacity Fading Mechanism for Fe-Substituted LiCoO[sub 2] Positive Electrode

Cited by 32 publications

References 30 publications

Layered Oxide Cathodes for Sodium‐Ion Batteries: Phase Transition, Air Stability, and Performance

Layered Oxide Cathodes for Sodium‐Ion Batteries: Phase Transition, Air Stability, and Performance

Recent research progress on iron- and manganese-based positive electrode materials for rechargeable sodium batteries

A laboratory-based hard x-ray monochromator for high-resolution x-ray emission spectroscopy and x-ray absorption near edge structure measurements

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