Nanoarchitectured LiMn2O4/Graphene/ZnO Composites as Electrodes for Lithium Ion Batteries

Aziz, Saad; Zhao, Jianqing; Cain, Carrington; Wang, Ying

doi:10.1016/j.jmst.2014.03.007

Cited by 41 publications

(25 citation statements)

References 38 publications

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“…As shown in the schematic illustrations in Figure 1a, the ALD growth of Al 2 O 3 coating at the surface of NCM811 particles was subjected to a sequence of chemisorption and self-terminating surface reactions (Equations (1) and (2) in Section 2.2). Detailed deposition mechanisms for the different oxides, involving Al 2 O 3 , ZnO and ZrO 2 , can be found in our previous work [12,[36][37][38][39][40]. As a result, ultrathin oxide coatings under ALD growth always reveal desirable conformality, uniformity, robustness, and pinhole-free features.…”

Section: Characteristics Of Al 2 O 3 Layer Deposited On Ncm811 Particmentioning

confidence: 99%

Ultrathin Al2O3 Coating on LiNi0.8Co0.1Mn0.1O2 Cathode Material for Enhanced Cycleability at Extended Voltage Ranges

et al. 2019

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Ni-rich LiNi0.8Co0.1Mn0.1O2 oxide has been modified by ultrathin Al2O3 coatings via atomic layer deposition (ALD) at a growth rate of 1.12 Å/cycle. All characterizations results including TEM, SEM, XRD and XPS together confirm high conformality and uniformity of the resultant Al2O3 layer on the surface of LiNi0.8Co0.1Mn0.1O2 particles. Coating thickness of the Al2O3 layer is optimized at ~2 nm, corresponding to 20 ALD cycles to enhance the electrochemical performance of Ni-rich cathode materials at extended voltage ranges. As a result, 20 Al2O3 ALD-coated LiNi0.8Co0.1Mn0.1O2 cathode material can deliver an initial discharge capacity of 212.8 mAh/g, and an associated coulombic efficiency of 84.0% at 0.1 C in a broad voltage range of 2.7–4.6 V vs. Li+/Li in the first cycle, which were both higher than 198.2 mAh/g and 76.1% of the pristine LiNi0.8Co0.1Mn0.1O2 without the Al2O3 protection. Comparative differential capacity (dQ/dV) profiles and electrochemical impedance spectra (EIS) recorded in the first and 100th cycles indicated significant Al2O3 ALD coating effects on suppressing phase transitions and electrochemical polarity of the Ni-rich LiNi0.8Co0.1Mn0.1O2 core during reversible lithiation/delithiation. This work offers oxide-based surface modifications with precise thickness control at an atomic level for enhanced electrochemical performance of Ni-rich cathode materials at extended voltage ranges.

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Section: Characteristics Of Al 2 O 3 Layer Deposited On Ncm811 Particmentioning

confidence: 99%

Ultrathin Al2O3 Coating on LiNi0.8Co0.1Mn0.1O2 Cathode Material for Enhanced Cycleability at Extended Voltage Ranges

et al. 2019

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“…In order to improve the electrochemical performance of the LiMn 2 O 4 /graphene hybrid, a layer of ZnO was further coated through ALD. 401 …”

Section: Lithium Manganate/graphene Hybridmentioning

confidence: 99%

Recent advances in graphene and its metal-oxide hybrid nanostructures for lithium-ion batteries

et al. 2015

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Today, one of the major challenges is to provide green and powerful energy sources for a cleaner environment. Rechargeable lithium-ion batteries (LIBs) are promising candidates for energy storage devices, and have attracted considerable attention due to their high energy density, rapid response, and relatively low self-discharge rate. The performance of LIBs greatly depends on the electrode materials; therefore, attention has been focused on designing a variety of electrode materials. Graphene is a two-dimensional carbon nanostructure, which has a high specific surface area and high electrical conductivity. Thus, various studies have been performed to design graphene-based electrode materials by exploiting these properties. Metal-oxide nanoparticles anchored on graphene surfaces in a hybrid form have been used to increase the efficiency of electrode materials. This review highlights the recent progress in graphene and graphene-based metal-oxide hybrids for use as electrode materials in LIBs. In particular, emphasis has been placed on the synthesis methods, structural properties, and synergetic effects of metal-oxide/graphene hybrids towards producing enhanced electrochemical response. The use of hybrid materials has shown significant improvement in the performance of electrodes.

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“…LiMn 2 O 4 is a 4.0 V cathode. [ 386 ] Lithium cycling performance of ZnO-ALD-modifi ed LiMn 2 O 4 /graphene possessing a capacity of 122 mAh g −1 after 100 electrochemical cycles was reported by Aziz et al [ 387 ] A LiMn 2 O 4 -graphene composite produced by electrophoretic co-deposition delivered an improved average energy density of 59.6 Wh kg −1 along with a power density of 697 W kg −1 . [ 388 ] Other transition metals (such as nickel, cobalt and iron) were also incorporated into LiMn 2 O 4 to improve its properties.…”

Section: Spinelmentioning

confidence: 97%

Graphene‐Containing Nanomaterials for Lithium‐Ion Batteries

Lü

et al. 2015

Advanced Energy Materials

205

111

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Graphene‐containing nanomaterials have emerged as important candidates for electrode materials in lithium‐ion batteries (LIBs) due to their unique physical properties. In this review, a brief introduction to recent developments in graphene‐containing nanocomposite electrodes and their derivatives is provided. Subsequently, synthetic routes to nanoparticle/graphene composites and their electrochemical performance in LIBs are highlighted, and the current state‐of‐the‐art and most recent advances in the area of graphene‐containing nanocomposite electrode materials are summarized. The limitations of graphene‐containing materials for energy storage applications are also discussed, with an emphasis on anode and cathode materials. Potential research directions for the future development of graphene‐containing nanocomposites are also presented, with an emphasis placed on practicality and scale‐up considerations for taking such materials from benchtop curiosities to commercial products.

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Nanoarchitectured LiMn2O4/Graphene/ZnO Composites as Electrodes for Lithium Ion Batteries

Cited by 41 publications

References 38 publications

Ultrathin Al2O3 Coating on LiNi0.8Co0.1Mn0.1O2 Cathode Material for Enhanced Cycleability at Extended Voltage Ranges

Ultrathin Al2O3 Coating on LiNi0.8Co0.1Mn0.1O2 Cathode Material for Enhanced Cycleability at Extended Voltage Ranges

Recent advances in graphene and its metal-oxide hybrid nanostructures for lithium-ion batteries

Graphene‐Containing Nanomaterials for Lithium‐Ion Batteries

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