Suitable binder for Li-ion battery anode produced from rice husk

Kumagai, Seiji; Abe, Yusuke; Tomioka, Masahiro; Kabir, Mahmudul

doi:10.1038/s41598-021-95297-9

Cited by 18 publications

(16 citation statements)

References 59 publications

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“…The primary role of the polymeric binder is to create chemo-mechanical stability at two scales: (1) the particle scale to prevent pulverization by creating an adhesive layer at the particle surface and (2) the electrode wide mesoscale to provide structural stability between the different composite electrode components during cycling. , Therefore, a binder should have specific chemical functionality to adhere to the active material particle surface and have functionalities that provide for mechanical characteristics that can accommodate volume expansions/contractions. Both properties are integral to achieving stable electrochemical performance in a composite electrode.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Role of Polymer Interactions within Binders in Composite Lithium-Ion Anodes

et al. 2022

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The discovery of design principles for effective and robust binder systems is key toward pushing the boundaries of electrochemical performance in next-generation high-capacity anode electrodes. To achieve high-performing multicomponent binder systems, rational design of polymer formulations must be conducted to carefully tune the different physical, mechanical, chemical, conductive, and transport properties of the composite electrode. Here, we look at electrochemical performance through a polymer configuration lens to understand how intercomponent interactions of a co-binder polymeric system affect mechanical properties and electrochemical behavior of a magnetite composite electrode. By systemically changing the chain length of a poly(vinyl alcohol)/ poly(acrylic acid) (PVA/PAA) blend, we investigate the effect of pairwise interactions between the polymers to shed light on mechanistic frameworks that affect electrochemical performance. We discovered that electrochemical results coincide with three polymer configurational regimes that depend on chain length. These results contribute to the growing body of work that aims to elucidate experimental design principles that aid in pushing development of binder systems for high-performing power-dense anode formulations.

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Section: Introductionmentioning

confidence: 99%

Understanding the Role of Polymer Interactions within Binders in Composite Lithium-Ion Anodes

et al. 2022

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“…The number of oxygen atoms ( x ) in SiO x in the RH carbonized at 1000 °C was found to be close to 2 17 . Under this assumption, the SiO x in C/SiO x AMs can react with Li ions according to the following chemical formulae [Eqs.…”

Section: Resultsmentioning

confidence: 88%

“…Ju et al stated that RH-derived C/SiO x exhibits a large irreversible capacity of 46.7% Coulombic efficiency (CE) at the initial Li-ion insertion and extraction 22 . Kumagai et al also reported ~ 53% CE at the initial Li-ion uptake and release 17 . The large irreversible capacity of RH-derived C/SiO x has been demonstrated elsewhere 15 , 20 – 23 .…”

Section: Introductionmentioning

confidence: 91%

“…However, the use of SiO x has been an alternative countermeasure to increase the anode capacity of cells. High specific capacities of 1965 and 2043 mAh g −1 were obtained for SiO 2 and SiO, respectively 7 , 17 . The reduction reaction of SiO x with Li ions can produce lithium silicate (Li x SiO y ) and lithium oxide (Li 2 O), leading to a smaller volume expansion at succeeding cycles of Li-ion uptake and release and thus, higher cycle stability 17 .…”

Section: Introductionmentioning

confidence: 99%

“…High specific capacities of 1965 and 2043 mAh g −1 were obtained for SiO 2 and SiO, respectively 7 , 17 . The reduction reaction of SiO x with Li ions can produce lithium silicate (Li x SiO y ) and lithium oxide (Li 2 O), leading to a smaller volume expansion at succeeding cycles of Li-ion uptake and release and thus, higher cycle stability 17 . However, SiO x has a lower electrical conductivity than C and Si, requiring a high-level conductive agent (e.g., carbon black) to fabricate the anode.…”

Section: Introductionmentioning

confidence: 99%

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Role of SiOx in rice-husk-derived anodes for Li-ion batteries

Abe

Tomioka

Kabir

et al. 2022

Sci Rep

Self Cite

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The present study investigated the role of SiOx in a rice-husk-derived C/SiOx anode on the rate and cycling performance of a Li-ion battery. C/SiOx active materials with different SiOx contents (45, 24, and 5 mass%) were prepared from rice husk by heat treatment and immersion in NaOH solution. The C and SiOx specific capacities were 375 and 475 mAh g−1, respectively. A stable anodic operation was achieved by pre-lithiating the C/SiOx anode. Full-cells consisting of this anode and a Li(Ni0.5Co0.2Mn0.3)O2 cathode displayed high initial Coulombic efficiency (~ 85%) and high discharge specific capacity, indicating the maximum performance of the cathode (~ 150 mAh g−1). At increased current density, the higher the SiOx content, the higher the specific capacity retention, suggesting that the time response of the reversible reaction of SiOx with Li ions is faster than that of the C component. The full-cell with the highest SiOx content exhibited the largest decrease in cell specific capacity during the cycle test. The structural decay caused by the volume expansion of SiOx during Li-ion uptake and release degraded the cycling performance. Based on its high production yield and electrochemical benefits, degree of cycling performance degradation, and disadvantages of its removal, SiOx is preferably retained for Li-ion battery anode applications.

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Flexible All‐Inorganic Perovskite Photodetector with a Combined Soft‐Hard Layer Produced by Ligand Cross‐Linking

Shi

Chen

et al. 2023

Advanced Science

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Although perovskite nanocrystals have attracted considerable interests as emerging semiconductors in optoelectronic devices, design and fabrication of a deformable structure with high stability and flexibility while meeting the charge transport requirements remain a huge challenge. Herein, a combined soft-hard strategy is demonstrated to fabricate intrinsically flexible all-inorganic perovskite layers for photodetection via ligand cross-linking. Perfluorodecyltrichlorosilane (FDTS) is employed as the capping ligand and passivating agent bound to the CsPbBr 3 surface via Pb-F and Br-F interactions. The Si-Cl head groups of FDTS are hydrolyzed to produce Si-OH groups which subsequently condense to form the Si-O-Si network. The CsPbBr 3 @FDTS nanocrystals (NCs) are monodispersed cubes with an average particle size of 13.03 nm and exhibit excellent optical stability. Furthermore, the residual hydroxyl groups on the surface of the CsPbBr 3 @FDTS render the NCs tightly packed and cross-linked to each other to form a dense and elastic CsPbBr 3 @FDTS film with soft and hard components. The photodetector based on the flexible CsPbBr 3 @FDTS film exhibits outstanding mechanical flexibility and robust stability after 5000 bending cycles.

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Suitable binder for Li-ion battery anode produced from rice husk

Cited by 18 publications

References 59 publications

Understanding the Role of Polymer Interactions within Binders in Composite Lithium-Ion Anodes

Understanding the Role of Polymer Interactions within Binders in Composite Lithium-Ion Anodes

Role of SiOx in rice-husk-derived anodes for Li-ion batteries

Flexible All‐Inorganic Perovskite Photodetector with a Combined Soft‐Hard Layer Produced by Ligand Cross‐Linking

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