Ten years left to redesign lithium-ion batteries

Turcheniuk, Kostiantyn; Bondarev, D. E.; Singhal, Vinod R.; Yushin, Gleb

doi:10.1038/d41586-018-05752-3

Cited by 452 publications

(337 citation statements)

References 4 publications

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“…[1][2][3] To satisfy the blooming development of these devices, lower-cost, higher energy density, much long-lasting rechargeable batteries are in high demand for next-generation energy storage systems. [1][2][3] To satisfy the blooming development of these devices, lower-cost, higher energy density, much long-lasting rechargeable batteries are in high demand for next-generation energy storage systems.…”

Section: Introductionmentioning

confidence: 99%

“…Herein, without using elemental sulfur and carbon material as precursors, a covalent sulfur-carbon complex SC-BDSA (S, 40.1%) is successfully prepared with m-C 6 H 4 (SO 3 H) 2 (BDSA) and K 2 SO 4 as the started materials, in which sulfurcarbon bridge-bonds with different chain lengths (C-S x -C) are coexisted with partial sulfonate (R-SO). We demonstrate that m-C 6 H 4 (SO 3 H) 2 is the dual source of short-chain covalent-sulfur and carbon matrix, while K 2 SO 4 is the long-chain sulfur precursor as well as the salt template and active agent.…”

Section: Introductionmentioning

confidence: 99%

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Controllable Chain‐Length for Covalent Sulfur–Carbon Materials Enabling Stable and High‐Capacity Sodium Storage

Jing

Yang

et al. 2019

Advanced Energy Materials

155

120

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couple high-capacity sulfur positive electrodes with earth-abundant sodium negative electrodes are unsurprisingly considered as a promising candidate. [8][9][10][11] In the process of cycle, the elemental sulfur of the cathode is dissolvated, reduced to form various soluble polysulfides, that is, S x 2− ions and radicals (1 ≤ x ≤ 8), and eventually the insoluble Na 2 S 2 and Na 2 S. [8,10,12] However, the practical applications are seriously hindered by several obstacles, in which the fundamental challenges are originated from the insulating properties of elemental sulfur and sodium sulfides, the volume changes at the cathode on cycling and the dissolution of sodium poly sulfides in the electrolyte. [9,[13][14][15] To date, extensive efforts have been made toward the enhancement of RT-Na/S batteries, including Na 2 S cathodes, [16,17] carbonaceous buffer matrixes, [12,18,19] a class of sodium polysulfides, [20,21] and the functional carbon-coated Nafion separator. [22] These approaches, while are validated to improve the cyclability of the RT Na-S batteries, tend to result in complicated synthetic processes and decreased theoretical capacity. In addition, it was suggested that the polar-polar interaction is a strong chemical interaction between polar sodium polysulfides and polar host materials. [23,24] Although there is no universal conclusion on the exact configuration of the interactions due to the complexity of carbon matrix, their similar effect in suppressing the polysulfide shuttle has also been reported in Li-S battery systems. [25][26][27] Instead of relying on polar-polar interactions, the suitably tailored hosts can bind sodium polysulfides through metal-sulfur bonding. Examples of such materials are sub-stoichiometric metal chalcogenides, MXene phases and metal-organic frameworks (MOFs). [28][29][30][31] In practice, these oxide and sulfide materials are able to bridge sodium polysulfides through both polar-polar Na-S(O) interaction and Lewis acid-base bonding, depending on the exposed facets to some extent. [25,32] However, to simply increase metal and/or binder content only neutralizes the advantageous energy density of the overall cell. Moreover, most of the sulfur-carbon electrode materials are directly prepared using elemental S and various carbon matrixes as started materials through vapor-infiltration or meltinfusion method. [8,10] As a result, the aggregated particles are Room temperature sodium-sulfur batteries have emerged as promising candidate for application in energy storage. However, the electrodes are usually obtained through infusing elemental sulfur into various carbon sources, and the precipitation of insoluble and irreversible sulfide species on the surface of carbon and sodium readily leads to continuous capacity degradation. Here, a novel strategy is demonstrated to prepare a covalent sulfur-carbon complex (SC-BDSA) with high covalent-sulfur concentration (40.1%) that relies on SO 3 H (Benzenedisulfonic acid, BDSA) and SO 4 2− as the sulfur source rather than elemental sulfur. M...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Controllable Chain‐Length for Covalent Sulfur–Carbon Materials Enabling Stable and High‐Capacity Sodium Storage

Jing

Yang

et al. 2019

Advanced Energy Materials

155

120

View full text Add to dashboard Cite

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confidence: 99%

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research on lithium-ion battery cathodes has been largely dominated by layered rock salt materials in the Li x (Ni-Mn-Co-Al) 2−x O 2 (NMCA) compositional space, [3,4] in which redox activity is limited to Co and Ni. [1,3,5] The fact that the cathode structure has to be layered and remain layered upon cycling greatly restricts the changes which can be made to NMCA-type rock salt chemistries.Recent progress in the development of Li percolation theory for rock salt compounds, in which Li transport still takes place even when the cations are disordered, has greatly enlarged the design space for cathode materials. [1,3,5] The fact that the cathode structure has to be layered and remain layered upon cycling greatly restricts the changes which can be made to NMCA-type rock salt chemistries.

Recent progress in the development of Li percolation theory for rock salt compounds, in which Li transport still takes place even when the cations are disordered, has greatly enlarged the design space for cathode materials.

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mentioning

confidence: 99%

Improved Cycling Performance of Li‐Excess Cation‐Disordered Cathode Materials upon Fluorine Substitution

Lun

Ouyang

Kitchaev

et al. 2018

Advanced Energy Materials

154

241

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research on lithium-ion battery cathodes has been largely dominated by layered rock salt materials in the Li x (Ni-Mn-Co-Al) 2−x O 2 (NMCA) compositional space, [3,4] in which redox activity is limited to Co and Ni. Cobalt in particular is expensive and relatively scarce compared to other 3d transition metals, such as Fe or Mn. [1,3,5] The fact that the cathode structure has to be layered and remain layered upon cycling greatly restricts the changes which can be made to NMCA-type rock salt chemistries.Recent progress in the development of Li percolation theory for rock salt compounds, in which Li transport still takes place even when the cations are disordered, has greatly enlarged the design space for cathode materials. [6,7] Lifting the requirement that cations form an ordered (layered) structure enables the use of various transition metal (TM) redox centers, including Mn 3+ /Mn 4+ , [8,9] Mn 2+ /Mn 4+ , [5,10] Cr 3+ /Cr 5+ , [6,11] Mo 3+ /Mo 6+ , [12] and V 3+ /V 5+ . [11,13] Because these compounds need Li excess to achieve Li percolation, [6,7] they typically also contain high valent charge compensators, such as Nb 5+ , [8,9] Sb 5+ , [14] Mo 6+ , [15,16] and Ti 4+ . [16][17][18] In addition, fluorine substitution is facile inThe recent discovery of Li-excess cation-disordered rock salt cathodes has greatly enlarged the design space of Li-ion cathode materials. Evidence of facile lattice fluorine substitution for oxygen has further provided an important strategy to enhance the cycling performance of this class of materials. Here, a group of Mn 3+ -Nb 5+ -based cation-disordered oxyfluorides, Li 1.2 Mn 3+ 0.6+0.5x Nb 5+ 0.2−0.5x O 2−x F x (x = 0, 0.05, 0.1, 0.15, 0.2) is investigated and it is found that fluorination improves capacity retention in a very significant way. Combining spectroscopic methods and ab initio calculations, it is demonstrated that the increased transition-metal redox (Mn 3+ /Mn 4+ ) capacity that can be accommodated upon fluorination reduces reliance on oxygen redox and leads to less oxygen loss, as evidenced by differential electrochemical mass spectroscopy measurements. Furthermore, it is found that fluorine substitution also decreases the Mn 3+ -induced Jahn-Teller distortion, leading to an orbital rearrangement that further increases the contribution of Mn-redox capacity to the overall capacity.

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“…For many demanding applications, energy storage devices should ideally be able to adjust to a variety of shapes, forms, and functions, while exhibiting excellent mechanical and electrochemical properties . However, the currently practically achievable levels of energy density (≈600 Wh L −1 ) and specific energy (≈220 Wh kg −1 ) in the conventional pouch or prismatic LIBs decrease dramatically when a battery cell is manufactured to be flexed or bent or to carry a mechanical load . Excellent visualization of specific energy of batteries as a function of their mechanical properties such as specific strength or stiffness can be seen in the work of Thomas and Qidwai .…”

Section: Introductionmentioning

confidence: 99%

Flexible Nanofiber‐Reinforced Solid Polymer Lithium‐Ion Battery

et al. 2019

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Herein, the new concept of an all‐nanofiber‐reinforced multifunctional battery is developed and demonstrated. The conventional liquid electrolyte, polymer separator, and powder‐based cathode are replaced by a nanofiber‐enhanced solid polymer electrolyte and carbon nanotube (CNT) fabric conformably coated with an active cathode material. Chemical vapor deposition (CVD) of iron phosphate (FePO4) is selected for the cathode fabrication in this first demonstration. Oxide nanofibers in the polymer electrolyte greatly enhance the electrochemical stability of the electrolyte and resistance to Li dendrite shortening at higher current densities. In addition, the oxide nanofibers increase the polymer mechanical strength and strain by 20–30%. The stand‐alone CNT@FePO4 cathode infiltrated with the polymer electrolyte exhibits more than five times higher modulus of toughness than that of the Al current collector. The as‐produced structural battery based on these fabricated components exhibits exceptional stability with no signs of performance decay at 50 °C, thus demonstrating great promise of the new architecture for a broad range of multifunctional and flexible battery applications.

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Ten years left to redesign lithium-ion batteries

Cited by 452 publications

References 4 publications

Controllable Chain‐Length for Covalent Sulfur–Carbon Materials Enabling Stable and High‐Capacity Sodium Storage

Controllable Chain‐Length for Covalent Sulfur–Carbon Materials Enabling Stable and High‐Capacity Sodium Storage

Improved Cycling Performance of Li‐Excess Cation‐Disordered Cathode Materials upon Fluorine Substitution

Flexible Nanofiber‐Reinforced Solid Polymer Lithium‐Ion Battery

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