Hard Carbon and Li4Ti5O12-Based Physically Mixed Anodes for Superior Li-Battery Performance with Significantly Reduced Li Content: A Case of Synergistic Materials Cooperation

Sharma, Neha; Puthusseri, Dhanya; Thotiyl, Musthafa Ottakam; Ogale, Satishchandra

doi:10.1021/acsomega.7b01659

Cited by 8 publications

(8 citation statements)

References 34 publications

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“…It can be anticipated that SEI formed in mixed composites consists of different interfaces. Thus electrolyte decomposition processes are governed by both phases . The cycled electrodes all show noticeable Al 2 O 3 NPs surrounding the LMNO single-crystal particles, as supported by EDX studies.…”

Section: Resultsmentioning

confidence: 52%

Stabilizing High-Voltage Cathodes via Ball-Mill Coating with Flame-Made Nanopowder Electrolytes

Brandt

Temeche

et al. 2022

ACS Appl. Mater. Interfaces

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LiMn1.5Ni0.5O4 (LMNO) spinel has recently been the subject of intense research as a cathode material because it is cheap, cobalt-free, and has a high discharge voltage (4.7 V). However, the decomposition of conventional liquid electrolytes on the cathode surface at this high oxidation state and the dissolution of Mn2+ have hindered its practical utility. We report here that simply ball-mill coating LMNO using flame-made nanopowder (NPs, 5–20 wt %, e.g., LiAlO2, LATSP, LLZO) electrolytes generates coated composites that mitigate these well-recognized issues. As-synthesized composite cathodes maintain a single P4332 cubic spinel phase. Transmission electron microscopy (TEM) and X-ray photoelectron spectra (XPS) show island-type NP coatings on LMNO surfaces. Different NPs show various effects on LMNO composite cathode performance compared to pristine LMNO (120 mAh g–1, 93% capacity retention after 50 cycles at C/3, ∼67 mAh g–1 at 8C, and ∼540 Wh kg–1 energy density). For example, the LMNO + 20 wt % LiAlO2 composite cathodes exhibit Li+ diffusivities improved by two orders of magnitude over pristine LMNO and discharge capacities up to ∼136 mAh g–1 after 100 cycles at C/3 (98% retention), while 10 wt % LiAlO2 shows ∼110 mAh g–1 at 10C and an average discharge energy density of ∼640 Wh kg–1. Detailed postmortem analyses on cycled composite electrodes demonstrate that NP coatings form protective layers. In addition, preliminary studies suggest potential utility in all-solid-state batteries (ASSBs).

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Section: Resultsmentioning

confidence: 52%

Stabilizing High-Voltage Cathodes via Ball-Mill Coating with Flame-Made Nanopowder Electrolytes

Brandt

Temeche

et al. 2022

ACS Appl. Mater. Interfaces

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“…The wide potential range of 0.02–3.0 V could render LTO with higher reversible capacity, and both carbon and Cu nanoparticles contribute to the whole electronic conductivity. Table provides some comparisons for the similarly modified LTO. − Despite the difference in fabrication methods and components, LTO@C-Cu exhibits the capacities comparable to or even higher than those in the literature.…”

Section: Resultsmentioning

confidence: 97%

Dual-Modified Li₄Ti₅O₁₂ Anode by Copper Decoration and Carbon Coating to Boost Lithium Storage

Bai

2020

ACS Sustainable Chem. Eng.

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The low electronic conduction of Li 4 Ti 5 O 12 negative materials for Li-ion batteries leads to unsatisfactory electrochemical performance. Here, we report a Li 4 Ti 5 O 12 anode modified by copper decoration and carbon coating to simultaneously boost the Li-ion storage capacity and rate capabilities. The optimal Li 4 Ti 5 O 12 anode reveals a remarkable reversible Li-ion storage capacity (285.3 mAh g −1 when cycled at 100 mA g −1 for 100 cycles) and significantly improved rate capabilities compared to pristine Li 4 Ti 5 O 12 . When cycled at 1000 mA g −1 , a reversible capacity of 189.4 mAh g −1 is retained after 500 cycles. The greatly enhanced electrochemical property is attributed to the dual effect of the carbon coating and copper decoration, which promotes the whole electronic conductivity.

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“…[42] The cells were tested in the range 4-1 V. The CTS NPs anode was pre-lithiated prior to the full cell fabrication to compensate for the first cycle loss. The half-cell performance of LCO is provided in our previous work.…”

Section: Resultsmentioning

confidence: 99%

“…The half-cell performance of LCO is provided in our previous work. [42] The cells were tested in the range 4-1 V. The CTS NPs anode was pre-lithiated prior to the full cell fabrication to compensate for the first cycle loss. The charge discharge profiles are given in Figure 7a.…”

Section: Resultsmentioning

confidence: 99%

Single‐Phase Cu₃SnS₄ Nanoparticles for Robust High Capacity Lithium‐Ion Battery Anodes

et al. 2019

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With the evolution of Li-ion batteries, they have been employed in many applications. However, high energy density and power density batteries are yet to be developed to meet the necessities at the application end. Sulfides are a good choice as anode material as they show a much higher specific capacity than conventional graphite anodes. But unfortunately, sulfide dissolution and polysulfide shuttling are big drawbacks for their operation. Herein, single phase ternary metal sulfide Cu 3 SnS 4 (CTS) nanoparticles are synthesized with high Cu : Sn ratio and examined for application as Li-ion battery anode. High specific capacities of 1082 mAh g À 1 at 0.2 A g À 1 and 440 mAh g À 1 at a high rate of 3 A g À 1 are realized with superior stability tested up to 950 cycles. Utilizing the CTS NPs can minimize the polysulfide dissolution. The high Cu : Sn ratio provides excess Cu atoms as the buffer matrix for volume expansion of Sn, leading to high stability and specific capacity. Compared to other reported Cu based mixed phase or composite ternary sulfide materials, the CTS NPs presented herein show a better performance. In a full cell device using LiCoO 2 (LCO) as cathode, a good performance is achieved as well with an energy density of 405 Wh/Kg at 0.1 A g À 1 . V-10 mA battery tester. The impedance and cyclic voltammetry were performed with VMP3 biologic system equipped with potentiostat and galvanostat channels.

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Hard Carbon and Li₄Ti₅O₁₂-Based Physically Mixed Anodes for Superior Li-Battery Performance with Significantly Reduced Li Content: A Case of Synergistic Materials Cooperation

Cited by 8 publications

References 34 publications

Stabilizing High-Voltage Cathodes via Ball-Mill Coating with Flame-Made Nanopowder Electrolytes

Stabilizing High-Voltage Cathodes via Ball-Mill Coating with Flame-Made Nanopowder Electrolytes

Dual-Modified Li₄Ti₅O₁₂ Anode by Copper Decoration and Carbon Coating to Boost Lithium Storage

Single‐Phase Cu₃SnS₄ Nanoparticles for Robust High Capacity Lithium‐Ion Battery Anodes

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Hard Carbon and Li4Ti5O12-Based Physically Mixed Anodes for Superior Li-Battery Performance with Significantly Reduced Li Content: A Case of Synergistic Materials Cooperation

Cited by 8 publications

References 34 publications

Stabilizing High-Voltage Cathodes via Ball-Mill Coating with Flame-Made Nanopowder Electrolytes

Stabilizing High-Voltage Cathodes via Ball-Mill Coating with Flame-Made Nanopowder Electrolytes

Dual-Modified Li4Ti5O12 Anode by Copper Decoration and Carbon Coating to Boost Lithium Storage

Single‐Phase Cu3SnS4 Nanoparticles for Robust High Capacity Lithium‐Ion Battery Anodes

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Product

Resources

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Hard Carbon and Li₄Ti₅O₁₂-Based Physically Mixed Anodes for Superior Li-Battery Performance with Significantly Reduced Li Content: A Case of Synergistic Materials Cooperation

Dual-Modified Li₄Ti₅O₁₂ Anode by Copper Decoration and Carbon Coating to Boost Lithium Storage

Single‐Phase Cu₃SnS₄ Nanoparticles for Robust High Capacity Lithium‐Ion Battery Anodes