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Andrei Dolocan
University of Texas at Austin
56Publications
22H-index
1,469Citations
Publications 56
Newest
#1Jason A. WeeksH-Index: 1
#2Ho-Hyun SunH-Index: 3
Last.C. Buddie MullinsH-Index: 49
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A tin oxide-carbon composite (SnOx-C) was fabricated as a candidate for use as an anode in lithium-ion batteries through the pyrolysis of a ditin citrate precursor. The simultaneous formation of tin oxide and semigraphitized carbon via a facile, solid-state pyrolysis yielded a composite containing tin oxide nanocrystals surrounded by a framework of flexible, porous carbon. Fabrication of tin oxide nanoparticles encased in semigraphitized carbon, led to the enhanced reversibility of Li2O formatio...
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Recent work on quasi-2D Ruddlesden-Popper phase organolead halide perovskites has shown they possess many interesting optical and physical properties. Most notably, they are significantly more stable when exposed to moisture when compared to the typical 3D perovskite methylammonium lead iodide (MAPI); direct evidence for the chemical source of this stability remains elusive, however. Here, we present a detailed study of the superior moisture stability of a quasi-2D Ruddlesden-Popper perovskite, ...
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#1Qiang Xie (University of Texas at Austin)H-Index: 2
#2Wangda Li (University of Texas at Austin)H-Index: 12
Last.Arumugam Manthiram (University of Texas at Austin)H-Index: 102
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Ultrahigh-Ni layered oxide cathodes (Ni content >90%) are at the forefront for potentially enabling higher-energy-density lithium-ion batteries. Unfortunately, they suffer from rapid capacity fade, poor thermal stability, and increased air sensitivity. Introduction of boron-based polyanion into layered cathodes has been found to be effective in stabilizing high-Ni cathodes, but the mechanism behind it is not yet fully understood. To develop a better understanding, we present here an extensive ch...
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#1Wangda Li (University of Texas at Austin)H-Index: 12
#2Andrei Dolocan (University of Texas at Austin)H-Index: 22
Last.Arumugam Manthiram (University of Texas at Austin)H-Index: 102
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1 CitationsSource
#1Robert J. BodnarH-Index: 54
#2Andrei DolocanH-Index: 22
Last.Zia RahmanH-Index: 8
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#1Ya You (University of Texas at Austin)H-Index: 23
#2Andrei Dolocan (University of Texas at Austin)H-Index: 22
Last.Arumugam Manthiram (University of Texas at Austin)H-Index: 102
view all 4 authors...
Undesired reactions between layered sodium transition-metal oxide cathodes and air impede their utilization in practical sodium-ion batteries. Consequently, a fundamental understanding of how layered oxide cathodes degrade in air is of paramount importance, but it has not been fully understood yet. Here a comprehensive study on a model material NaNi0.7Mn0.15Co0.15O2 reveals its reaction chemistry with air and the dynamic evolution of the degradation species upon air exposure. We find that beside...
5 CitationsSource
#1Melissa L. Meyerson (University of Texas at Austin)H-Index: 3
#2Jonathan K. Sheavly (University of Texas at Austin)H-Index: 1
Last.C. Buddie MullinsH-Index: 49
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With more than 10 times the capacity of the graphite used in current commercial batteries, lithium metal is ideal for a high-capacity battery anode; however, lithium metal electrodes suffer from safety and efficiency problems that prevent their wide industrial adoption. Their intrinsic high reactivity towards most liquid organic electrolytes leads to lithium loss and dendrite growth, which result in poor efficiency and short circuiting. However, the multitude of factors that contribute to dendri...
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#1Ho-Hyun Sun (University of Texas at Austin)H-Index: 3
#2Andrei Dolocan (University of Texas at Austin)H-Index: 22
Last.C. Buddie Mullins (University of Texas at Austin)H-Index: 49
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The performance of the rechargeable Li metal battery anode is limited by the poor ionic conductivity and poor mechanical properties of its solid-electrolyte interphase (SEI) layer. To overcome this, a 3 : 1 v/v ethyl methyl carbonate (EMC) : fluoroethylene carbonate (FEC) containing 0.8 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and 0.2 M lithium difluoro(oxalate)borate (LiDFOB) dual-salts with 0.05 M lithium hexafluorophosphate (LiPF6) was tested to promote the formation of a multitu...
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#1Rodrigo Rodriguez (University of Texas at Austin)H-Index: 2
#2Kathryn E. Loeffler (University of Texas at Austin)H-Index: 2
Last.C. Buddie MullinsH-Index: 49
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Capacity retention of anode-free cells, in which the cathode’s lithium was the sole lithium source, was studied. These cells fail by depletion of their limited amount of cycling lithium, unlike cells with lithium foil anodes in which the buildup of an insulating, dead lithium layer on the anodes causes failure. The electrolyte dependence of the deposition morphologies was also studied optically in a symmetrical cell built with lithium electrodes. After passage of 28 mAh cm–2, dendrite-free depos...
1 CitationsSource
#1Ya You (University of Texas at Austin)H-Index: 23
#2Hugo Celio (University of Texas at Austin)H-Index: 17
Last.Arumugam Manthiram (University of Texas at Austin)H-Index: 102
view all 5 authors...
11 CitationsSource
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