Silicon Microparticle Anodes with Self-Healing Multiple Network Binder

Xu, Zhixin; Yang, Jun; Zhang, Tao; Nuli, Yanna; Wang, Jiulin; Hirano, Shin‐ichi

doi:10.1016/j.joule.2018.02.012

Cited by 358 publications

(343 citation statements)

References 37 publications

Supporting

Mentioning

343

Contrasting

Order By: Relevance

“…The Si electrodes of interest with various binders showed different load profiles as a resistance strength to sustain the structure divided by the width of the 3M tapes during measurement. As for the pristine polysaccharide binders, the guar‐based electrode resulted in higher adhesion strength (0.48 N cm −1 ) than that of CMC (0.19 N cm −1 ) owing to its superstructure that enables more contact points with Si particles when comparing the minimum load strength of the results . The adhesive strength of BC‐g electrodes is much higher than that of bare guar because introducing the covalent bonds into the hydroxyl‐enriched polysaccharides effectively delocalizes the stress to the multiple side chains (i.e., boronic ester groups) and consequently improves the overall strength of electrodes.…”

Section: Resultsmentioning

confidence: 99%

“…When the strength of supramolecular interactions becomes much larger with secondary bonding structure, also referred to as self‐healing polymers, they have a highly reversible and stronger network to facilitate efficient recovery of dissociated bonds during the lithiation (discharge) . The urea‐based or water‐soluble polyacrylic acid (PAA)‐based self‐healing polymers provided multiple network structure, which can accommodate the repeated volume changes and result in improved cycle metrics, while its relatively intricate preparation method and poor availability are not suited for the practical consideration.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Room‐Temperature Crosslinkable Natural Polymer Binder for High‐Rate and Stable Silicon Anodes

Ryu

Kim

et al. 2019

Adv Funct Materials

111

View full text Add to dashboard Cite

Natural polymers with abundant side functionalities are emerging as a promising binder for high‐capacity yet large‐volume‐change silicon anodes with a strong and reversible supramolecular interaction that originates from secondary bonding. However, the supramolecular network solely based on hydrogen bonding is relatively vulnerable to repeated deformation and has an insufficient diffusivity of lithium ions. Herein, reported is a facile but efficient way of incorporating the natural polymers with an ionically conductive crosslinker, which can construct a robust network for silicon anodes. The boronic acid in the crosslinker spontaneously reacts with natural polymers to generate boronic esters at room temperature without any kind of triggers, which gives a strong and dynamic covalent bonding to the supramolecular network. The other component in the crosslinker, polyethylene oxide, contributes to the enhanced ionic conductivity of polymers, leading to outstanding rate performances even at a high mass loading of silicon nanoparticles (>2 mg cm−2). The small portion of the proposed crosslinker can modulate the strength of the entire network by balancing the covalent crosslinking and self‐healing secondary interaction along with the fast lithium‐ion diffusion, thus enabling the extended operation of silicon electrodes.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Room‐Temperature Crosslinkable Natural Polymer Binder for High‐Rate and Stable Silicon Anodes

Ryu

Kim

et al. 2019

Adv Funct Materials

111

View full text Add to dashboard Cite

show abstract

“…It should also be noted that the integration of the Si/G/C composite with a suitable binder at the electrode level is also critical for maintaining the integrity of the electrode and achieving superior performance. A wide range of polymeric binders with functionalities such as cross-linking, enhancing conductivity, and self-healing are being explored for silicon electrodes, [87][88][89][90][91][92][93][94] and this knowledge can be leveraged to develop Si/ G/C electrodes. Considering the abundance of carbon sources and the variety of Si/G/C composites, an integrated design with multicomponent interlinking among the Si/G/ C composite and the binder (such as hydrogen bonding, ion-dipole interactions, covalent bonding, etc) could create a synergy for achieving high-capacity Si/G/C electrodes with high cycling stability.…”

Section: Summary and Perspectivesmentioning

confidence: 99%

The critical role of carbon in marrying silicon and graphite anodes for high‐energy lithium‐ion batteries

et al. 2019

View full text Add to dashboard Cite

Increasing the energy density of conventional lithium-ion batteries (LIBs) is important for satisfying the demands of electric vehicles and advanced electronics.Silicon is considered as one of the most-promising anodes to replace the traditional graphite anode for the realization of high-energy LIBs due to its extremely high theoretical capacity, although its severe volume changes during lithiation/delithiation have led to a big challenge for practical application. In contrast, the co-utilization of Si and graphite has been well recognized as one of the preferred strategies for commercialization in the near future. In this review, we focus on different carbonaceous additives, such as carbon nanotubes, reduced graphene oxide, and pyrolyzed carbon derived from precursors such as pitch, sugars, heteroatom polymers, and so forth, which play an important role in constructing micrometersized hierarchical structures of silicon/graphite/carbon (Si/G/C) composites and tailoring the morphology and surface with good structural stability, good adhesion, high electrical conductivity, high tap density, and good interface chemistry to achieve high capacity and long cycling stability simultaneously. We first discuss the importance and challenge of the co-utilization of Si and graphite. Then, we carefully review and compare the improved effects of various types of carbonaceous materials and their associated structures on the electrochemical performance of Si/G/C composites. We also review the diverse synthesis techniques and treatment methods, which are also significant factors for optimizing Si/G/C composites. Finally, we provide a pertinent evaluation of these forms of carbon according to their suitability for commercialization. We also make far-ranging suggestions with regard to the selection of proper carbonaceous materials and the design of Si/G/C composites for further development. K E Y W O R D Scarbonaceous additives, graphite, high energy, lithium-ion batteries, silicon ---

show abstract

“…In the last few decades, tremendous efforts have been made to solve the above mentioned problems. Among them, reducing silicon dimension (nanoparticle, nanowire or nanosheet), exploiting robust binders and particularly designing hierarchical or confined structures are the main routes to enhance the electrochemical performances of silicon‐based anodes . Nanometer Si anodes not only can improve the kinetics of carriers but also suppress the material pulverization owing to sufficient stress relaxation .…”

Section: Introductionmentioning

confidence: 99%

“…Among them, reducing silicon dimension (nanoparticle, nanowire or nanosheet), exploiting robust binders and particularly designing hierarchical or confined structures are the main routes to enhance the electrochemical performances of silicon-based anodes. [5][6][7] Nanometer Si anodes not only can improve the kinetics of carriers but also suppress the material pulverization owing to sufficient stress relaxation. [8,9] Lastly, Fu et al described a special two-dimensional SiO x nanostructure which shows great cycling stability and rate capability.…”

Section: Introductionmentioning

confidence: 99%

Graphene Nanoscrolls with Confined Silicon Nanoparticles as a Durable Anode for Lithium‐Ion Batteries

Fan

et al. 2019

ChemNanoMat

View full text Add to dashboard Cite

Silicon anodes have been given great focus due to the unparalleled theoretical specific capacity. However, destructive volume expansion during lithiation/delithiation processes and intrinsic inferior electrical conductivity cause drastic capacity decay. Forming composites with conductive and stretchable material is an effective solution to address these problems. Here, a three‐dimensional continuous conductive network consisting of one‐dimensional flexible graphene nanoscroll wrapped silicon nanoparticles (Si@GNS) is realized by a simple cold quenching method followed by a facile annealing process. GNS acted as conductive framework and elastic buffer layer, improving electrochemical reaction kinetics and suppressing Si volume expansion, respectively. Hence, Si@GNS shows excellent rate capability of 760 mAh g−1 even at 2 A g−1 and long‐term cycling stability of 81.5% capacity retention after 1000 cycles.

show abstract

Silicon Microparticle Anodes with Self-Healing Multiple Network Binder

Cited by 358 publications

References 37 publications

Room‐Temperature Crosslinkable Natural Polymer Binder for High‐Rate and Stable Silicon Anodes

Room‐Temperature Crosslinkable Natural Polymer Binder for High‐Rate and Stable Silicon Anodes

The critical role of carbon in marrying silicon and graphite anodes for high‐energy lithium‐ion batteries

Graphene Nanoscrolls with Confined Silicon Nanoparticles as a Durable Anode for Lithium‐Ion Batteries

Contact Info

Product

Resources

About