Overlithiated Li 1+x Ni 0.5 Mn 1.5 O 4  in all one dimensional architecture with conversion type α-Fe 2 O 3 : A new approach to eliminate irreversible capacity loss

Aravindan, Vanchiappan; Nagasubramanian, Arun; Shubha, Nageswaran; Jayaraman, Sundaramurthy; Srinivasan, Madhavi

doi:10.1016/j.electacta.2016.08.078

Cited by 41 publications

(48 citation statements)

References 38 publications

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“…Among these studies, Aravindan et al. reported a Li 1.33 Ni 0.5 Mn 1.5 O 4 /α‐Fe 2 O 3 full cell that exhibited an energy density of ≈193 Wh kg −1 (based on only active material) with working voltage of 3.72 V . A CuO/LNMO full cell was reported by Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

A 4 V Li‐Ion Battery using All‐Spinel‐Based Electrodes

et al. 2018

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Boosting the performance of rechargeable lithium-ion batteries (LIBs) beyond the state-of-the-art is mandatory toward meeting the future energy requirements of the consumer mass market. The replacement of conventional graphite anodes with conversion-type metal-oxide anodes is one progressive approach toward achieving this goal. Here, a LIB consisting of a highcapacity spinel NiMn O anode and a high-voltage spinel LiNi Mn O cathode was proposed. Polyhedral-shaped NiMn O powder was prepared from a citrate precursor via the sol-gel method. Electrochemical tests showed that the NiMn O in a half-cell configuration could deliver reversible capacities of 750 and 303 mAh g at 0.1 and 3 C rates. Integrating the NiMn O anode into a full-cell configuration provided an estimated energy density of 506 Wh kg (vs. cathode mass) upon 100 cycles and excellent cycling performance over 150 cycles at the 0.1 C rate, which can be considered promising in terms of satisfying the demands for high energy densities in large-scale applications.

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Section: Introductionmentioning

confidence: 99%

A 4 V Li‐Ion Battery using All‐Spinel‐Based Electrodes

et al. 2018

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“…The over-lithiated Li1+xNi0.5Mn1.5O4 was synthesized by mixing the pristine compound with a reductive lithium-containing compound at 600 °C. In contrast, Aravindan et al electrochemically over-lithiated LNMO by using a Li metal cell [136].…”

Section: Over-lithiated Positive Electrode Materialsmentioning

confidence: 99%

“…Gabrielle et al and Mancini et al investigated different degrees of over-lithiated LNMO materials against graphite and Si/C composite anodes [140,141]. The over-lithiated Li 1+x Ni 0.5 Mn 1.5 O 4 was synthesized by mixing the pristine compound with a reductive lithium-containing compound at 600 • C. In contrast, Aravindan et al electrochemically over-lithiated LNMO by using a Li metal cell [136].…”

Section: Over-lithiated Positive Electrode Materialsmentioning

confidence: 99%

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

et al. 2018

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Abstract:In order to meet the sophisticated demands for large-scale applications such as electro-mobility, next generation energy storage technologies require advanced electrode active materials with enhanced gravimetric and volumetric capacities to achieve increased gravimetric energy and volumetric energy densities. However, most of these materials suffer from high 1st cycle active lithium losses, e.g., caused by solid electrolyte interphase (SEI) formation, which in turn hinder their broad commercial use so far. In general, the loss of active lithium permanently decreases the available energy by the consumption of lithium from the positive electrode material. Pre-lithiation is considered as a highly appealing technique to compensate for active lithium losses and, therefore, to increase the practical energy density. Various pre-lithiation techniques have been evaluated so far, including electrochemical and chemical pre-lithiation, pre-lithiation with the help of additives or the pre-lithiation by direct contact to lithium metal. In this review article, we will give a comprehensive overview about the various concepts for pre lithiation and controversially discuss their advantages and challenges. Furthermore, we will critically discuss possible effects on the cell performance and stability and assess the techniques with regard to their possible commercial exploration.

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“…Excellent electrochemical profiles are noted for both electrochemically overlithiated and treated assemblies when compared to excess cathode loading. Furthermore, the same procedure has been extended for the Ni‐doped spinel (LiNi 0.5 Mn 1.5 O 4 ), in which all the active materials are based on the 1D nanofibers prepared by electrospinning technique …”

Section: Overlithiated Cathodesmentioning

confidence: 99%

Best Practices for Mitigating Irreversible Capacity Loss of Negative Electrodes in Li‐Ion Batteries

Aravindan

Lee

Srinivasan

2017

Advanced Energy Materials

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128

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aprotic organic solvent. Poor rate capability, limited capacity (theoretical capacity of ≈372 mA h g -1 ), Li-plating issues, irreversible electrolyte decomposition in the first cycle, and subsequent solid electrolyte interphase (SEI) formation certainly offset the possible usage in high power Li-ion power packs. [5] Therefore, intense research activity has been carried out to replace the conventional graphitic anodes.Unfortunately, insertion type materials such as oxides, sulfides, and phosphates offer a higher working potential (>1 V vs Li), and decent practical capacity compared to graphite, which certainly dilutes the net energy density of the cell. For instance, Li 4 Ti 5 O 12 , the anatase and bronze phases of TiO 2 , LiCrTiO 4 , Nb 2 O 5 , TiNb 2 O 7 , TiP 2 O 7 , LiTi 2 (PO 4 ) 3 etc., have been extensively evaluated. [5,7,14] Spinel Li 4 Ti 5 O 12 , which is commercially available, utilizes a LiMn 2 O 4 cathode for HEV and EV applications, although it offers low theoretical energy density (≈200 W h kg -1 ). [13] Apart from the insertion, the emergence of high capacity, high power alloy and conversion (often called displacement) type materials has attracted widespread attention in the last two decades. It is worth mentioning that alloybased anodes with a hybrid cathode have been commercialized by Sony in a Nexelion configuration. Unlike that of the insertion process, an alloy and conversion-type electrode experiences several issues that need to be addressed, such as large volume variation, capacity fading upon cycling, and a significant irreversible capacity loss (ICL) during the first cycle, [15] before being employed as prospective an anode in cells for practical configurations.Although insertion materials experience ICL, it is negligible, whereas only 40 to 70% of the initial capacity is found irreversible in alloy and conversion type materials. The ICL may vary from material to material, and morphology to morphology primarily because of the decomposition of the electrolyte solution, which includes solvents and a salt reduction process. [16] Nevertheless, volume variation and capacity fading can certainly be improved by adopting a surface modification process preferably with carbon coating, making a composite with carbonaceous materials, or by preparing the electrode with either an active or inactive matrix. [17] Therefore, eliminating the ICL is critical before the full-cell assembly when using such high capacity conversion or alloy type anodes. [2,18,19] It is clear that the SEI layer is the main culprit for the significant ICL observed in the first cycle, since the Li consumption takes place in an Development of high performance lithium-ion (Li-ion) power packs is a topic receiving significant attention in research today. Future development of the Li-ion power packs relies on the development of high capacity and high rate anodes. More specifically, materials undergo either conversion or an alloying mechanism with Li. However, irreversible capacity loss (ICL) is one of the prime issues for this type ...

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Overlithiated Li 1+x Ni 0.5 Mn 1.5 O 4 in all one dimensional architecture with conversion type α-Fe 2 O 3 : A new approach to eliminate irreversible capacity loss

Cited by 41 publications

References 38 publications

A 4 V Li‐Ion Battery using All‐Spinel‐Based Electrodes

A 4 V Li‐Ion Battery using All‐Spinel‐Based Electrodes

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

Best Practices for Mitigating Irreversible Capacity Loss of Negative Electrodes in Li‐Ion Batteries

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