Electrochemical Performance of Li<i><sub>x</sub></i>SiON Polymer Electrolytes Derived from an Agriculture Waste Product, Rice Hull Ash

Temeche, Eleni; Zhang, Xinyu; Laine, Richard M.

doi:10.1021/acsapm.1c00192

Cited by 3 publications

(1 citation statement)

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“…Initial studies explored the performance of LMNO composite cathodes in ASSB configurations. As seen in Figure S9, ASSBs assembled with LMNO + 10 wt % LATSP as the composite cathode, polyethylene oxide (PEO) + 40 wt % of a polymer verison of lithium silicon oxynitride (Li 6 SiON) , film as a polymer electrolyte and separator, and spinel Li 4 Ti 5 O 12 (LTO) + 10 wt % Li 6 SiON as the anode . The ASSB assembled with LMNO + 10 wt % LATSP electrode shows a total resistivity of 400 Ω at 25 °C.…”

Section: Resultsmentioning

confidence: 99%

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: 99%

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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An Unexpected Source of Hard Carbon, Rice Hull Ash, Provides Unexpected Li⁺ Storage Capacities

Yu,

Wang,

Indris

et al. 2024

Advanced Sustainable Systems

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Hard carbon (HC) anodes used in secondary batteries have attracted increasing recent attention in particular to transition to new energy storage formats. To date, HC is produced exclusively by charring organic precursors in inert atmospheres. One would not expect to find HC in rice hull ash (RHA), the byproduct of rice hull combustion processes. However, in developing approaches to depolymerize RHA SiO2 (90:10 wt% SiO2:C) to produce silica‐depleted RHA or SDRHA40‐60 (40–60 wt% SiO2) to tailor C:SiO2 ratios for carbothermal reduction reactions, the SDRHA carbon component is recently revisited. In more detailed efforts to characterize the form of carbon present in SDRHA, a series of analyses reveal graphitized carbon domains in amorphous matrices, i.e., HC, despite RHA being produced via combustion in an oxidizing atmosphere. Comprehensive electrochemical analyses on SDRHA40‐60 find unexpected capacities far in excess (>700 mAh g−1) of reported values for HC and graphite. Electrochemical and STEM characterization suggest that the unexpected capacity may come from the nanoscale morphology of the amorphous carbon component. Given that RHA is a biowaste generated in kilotons/year worldwide, there seems to be an opportunity to develop sustainable high‐capacity anode materials for alkali‐ion storage systems.

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Investigation of the Electrochemical Performance of Titanium-Based MXene Hybridisation with Rice Husk Ash (RHA) as an Anode Catalyst Support Material

Nazamdin

Hanim

Saidur

et al. 2023

Metals

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MXenes possess unique features that are useful for broader industrial development. However, although many different compositions of MXenes have been discovered, little research has been conducted on the optimal synthesis strategy for producing the best MXenes yield. Therefore, substantial work is performed on the synthesis’ structure and property relationship for direct methanol fuel cell (DMFC) applications since MXenes have been successfully hybridised with rice husk ash (RHA). In this study, to produce titanium-based MXene, Ti3C2 nanopowders are added to the rice husk ash matrix to synthesise hybrid RHA/MXene composites (R-MX). Using different weight percentages of MXene hybridised with rice husk ash (2 wt. % R-MX, 4 wt. % R-MX and 6 wt. % R-MX), different electrochemical properties are obtained. Meanwhile, electrochemical analysis is undertaken to investigate the methanol oxidation performance using Linear Sweep Voltammetry (LSV). The highest percentage of the R-MX hybrid composite, 6 wt. % MXene, showed the lowest Tafel slope (148 mV/dec) and the highest ionic exchange current density in the same Tafel analysis. Moreover, the incorporation of MXene into RHA produced good results from the chronoamperometry analysis (CA), with the highest percentage of the hybrid composite, R-6MX, showing the highest retention rate of 97.28%. Meanwhile, the Nyquist plot analysis showed an increasing semicircle arc diameter at the lower-frequency region, implying a lower interfacial charge resistance upon the addition of MXene into RHA. This outcome corresponded to the CA and LSV analysis findings, R-6MX showed a remarkable performance in terms of having the highest peak current density of 0.9454 mA/cm2 and retention rate of 97.28%. Both of these values show that hybrid R-6MX was able to maintain a high current for the entire duration. The current is maintained in a stable form for some time, proving that R-6MX was the most stable, with a minimal corrosion reaction and tolerance in a methanol medium. The results from this study enabled an evaluation of the possibility of utilising low-cost, green RHA material for fuel cell applications to promote sustainability. The novelty of this work is that a cheap source of silica-based RHA, a type of waste material, is incorporated with MXene through hybridisation processes.

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Electrochemical Performance of Li_xSiON Polymer Electrolytes Derived from an Agriculture Waste Product, Rice Hull Ash

Cited by 3 publications

References 61 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

An Unexpected Source of Hard Carbon, Rice Hull Ash, Provides Unexpected Li⁺ Storage Capacities

Investigation of the Electrochemical Performance of Titanium-Based MXene Hybridisation with Rice Husk Ash (RHA) as an Anode Catalyst Support Material

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Electrochemical Performance of LixSiON Polymer Electrolytes Derived from an Agriculture Waste Product, Rice Hull Ash

Cited by 3 publications

References 61 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

An Unexpected Source of Hard Carbon, Rice Hull Ash, Provides Unexpected Li+ Storage Capacities

Investigation of the Electrochemical Performance of Titanium-Based MXene Hybridisation with Rice Husk Ash (RHA) as an Anode Catalyst Support Material

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Product

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Electrochemical Performance of Li_xSiON Polymer Electrolytes Derived from an Agriculture Waste Product, Rice Hull Ash

An Unexpected Source of Hard Carbon, Rice Hull Ash, Provides Unexpected Li⁺ Storage Capacities