Electrochemical behavior of LiNi0.6Mn0.2Co0.2O2 cathode in different aqueous electrolytes

Kunduraci, Muharrem; Mutlu, Rasiha Nefise; Gizir, A. Murat

doi:10.1007/s11581-020-03490-z

Cited by 9 publications

(5 citation statements)

References 34 publications

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Section: Resultsmentioning

confidence: 99%

“…[42] Hence, at 25 °C, WiSE electrolyte seems to be stable and not to face any drastic degradation, in agreement with the electrochemical stability of superconcentrated aqueous electrolytes under anodic polarization reported in previous studies. [4,43] Following these measurements at room temperature, the anodic stability of WiSE was assessed at higher temperature by cycling pressure cells at 55 °C. The evolution of pressure and potential as a function of time is reported in Figure 8b.…”

Section: Effects Of Wise and Wibs On The Positive Electrode Gassingmentioning

confidence: 99%

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Water‐in‐Salt Electrolyte (WiSE) for Aqueous Batteries: A Long Way to Practicality

Droguet

Grimaud

Fontaine

et al. 2020

Advanced Energy Materials

153

164

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Li-ion batteries, because of their outstanding performances, have become an integral part of our society. However, a remaining challenge regards ways to lower their cost and improve their sustainability. Toward that ambitious goal, several strategies are currently being explored, one being the use of aqueous electrolytes that are theoretically cheaper, safer, and less toxic than their organic counterparts. However, the major limitation in the development of aqueous electrolytes is the narrow thermodynamic electrochemical stability window (ESW) of water (1.23 V). Although it can be kinetically extended to 1.5 V when using salts in a diluted solution, such aqueous systems still do not compete against organic ones. Owing to this limitation that translates into poor energy density, Li-aqueous systems, as introduced in 1994 by Dahn and coworkers, could never be marketed. [1] To alleviate this issue, in continuation of early works dedicated to the development of superconcentrated organic electrolytes, [2] Suo et al. [3] proposed in 2015, an aqueous electrolyte made with a salt concentration of 21 mol kg −1 (21 m), denoted water-in-salt electrolytes (WiSE). Through this trick, the authors could enlarge the operating potential window of aqueous systems to 3 V while preserving an ionic conductivity alike that of classical organic electrolytes (≈10 mS cm −1). As a proof of concept, a 2.3 V battery using Mo 6 S 8 and LiMn 2 O 4 as negative and positive electrodes, respectively, was reported. Following this demonstration, Yamada et al. [4] then showed that mixing two organic lithium salts, thus forming a so-called water-in-bisalt electrolyte (WiBS), enables assembling aqueous batteries with a working potential as high as 3.1 V using Li 4 Ti 5 O 12 and LiNi 0.5 Mn 1.5 O 4 electrodes. Altogether, these studies have renewed interest for revisiting aqueous systems relying on the use of superconcentrated electrolytes, hence the recent reports on aqueous Na-ion, [5-9] K-ion, [10-13] Li-O 2 [14] or even quasi-solid-state batteries based on, e.g., polymer hydrogel electrolytes. [15-19] Different types of superconcentrated aqueous electrolytes are currently investigated for Li-aqueous systems. Most frequently used is the water-in-salt electrolyte based on one lithium salt, [3,20,21] usually LiTFSI or TFSI-derived salts which have the specificity to form F-based solid electrolyte interphase (SEI) at The sustainability of battery components is becoming a key parameter for storing renewable energy at large scale. Toward that goal, several strategies are currently being explored. Great hopes are placed in the use of superconcentrated aqueous electrolytes, which enlarge the electrochemical stability window well beyond 1.2 V. Although fundamentally elegant, the practicability of such an approach remains unknown. Therefore, an indepth analysis of the stability and cycling behavior of water-in-salt (WiSE) and water-in-bisalt (WiBS) electrolytes as a function of concentration and temperature is carried out by monitoring via combined operando ...

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Section: Resultsmentioning

confidence: 99%

Section: Effects Of Wise and Wibs On The Positive Electrode Gassingmentioning

confidence: 99%

Water‐in‐Salt Electrolyte (WiSE) for Aqueous Batteries: A Long Way to Practicality

Droguet

Grimaud

Fontaine

et al. 2020

Advanced Energy Materials

153

164

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“…Higher temperature calcination was shown to increase the particle size and crystallinity of the sample, as well as improve the electrochemical performance. 10 The XRD plot of Fig. 2a shows the diffraction pattern for the 11111 cathode.…”

Section: Resultsmentioning

confidence: 99%

Communication—Design of LiNi_0.2Mn_0.2Co_0.2Fe_0.2Ti_0.2O₂ as a High-Entropy Cathode for Lithium-Ion Batteries Guided by Machine Learning

Sturman

Yim

Baranova

et al. 2021

J. Electrochem. Soc.

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The use of “high-entropy” materials in electrodes is an emerging strategy to improve the stability and electrochemical properties of lithium-ion batteries. This study reports the machine learning-driven discovery of a high-entropy LiNi0.2Mn0.2Co0.2Fe0.2Ti0.2O2 layered oxide cathode. Battery testing reveals a good initial capacity (160 mAh g−1) with exceptional stability up to 4.4 V. These materials are a promising way to expand the design space of cathode candidates while using inexpensive transition metals. However, further optimization of these materials is needed to improve battery performance relative to traditional cathodes.

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“…This result was compared to the same electrode with 9 M LiNO 3 , showing a 1st cycle capacity of 132 mA h g −1 and only ∼79% capacity retention for the subsequent three cycles. 112 In addition, introducing additives to WiSE further stabilized LCO. Tris(trimethylsilyl) borate (TMSB) was sacrificially decomposed and formed a CEI layer.…”

Section: Ltmo As Cathodes For Aqueous Libsmentioning

confidence: 99%

Layered transition metal oxides (LTMO) for oxygen evolution reactions and aqueous Li-ion batteries

Kim,

Choi,

Kim

et al. 2023

Chem. Sci.

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Electrochemical behavior of LiNi0.6Mn0.2Co0.2O2 cathode in different aqueous electrolytes

Cited by 9 publications

References 34 publications

Water‐in‐Salt Electrolyte (WiSE) for Aqueous Batteries: A Long Way to Practicality

Water‐in‐Salt Electrolyte (WiSE) for Aqueous Batteries: A Long Way to Practicality

Communication—Design of LiNi_0.2Mn_0.2Co_0.2Fe_0.2Ti_0.2O₂ as a High-Entropy Cathode for Lithium-Ion Batteries Guided by Machine Learning

Layered transition metal oxides (LTMO) for oxygen evolution reactions and aqueous Li-ion batteries

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Electrochemical behavior of LiNi0.6Mn0.2Co0.2O2 cathode in different aqueous electrolytes

Cited by 9 publications

References 34 publications

Water‐in‐Salt Electrolyte (WiSE) for Aqueous Batteries: A Long Way to Practicality

Water‐in‐Salt Electrolyte (WiSE) for Aqueous Batteries: A Long Way to Practicality

Communication—Design of LiNi0.2Mn0.2Co0.2Fe0.2Ti0.2O2 as a High-Entropy Cathode for Lithium-Ion Batteries Guided by Machine Learning

Layered transition metal oxides (LTMO) for oxygen evolution reactions and aqueous Li-ion batteries

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Resources

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Communication—Design of LiNi_0.2Mn_0.2Co_0.2Fe_0.2Ti_0.2O₂ as a High-Entropy Cathode for Lithium-Ion Batteries Guided by Machine Learning