Zeolite-Templated Mesoporous Silicon Particles for Advanced Lithium-Ion Battery Anodes

Kim, Nahyeon; Park, Hye Jeong; Yoon, Naeun; Lee, Jeong Kyu

doi:10.1021/acsnano.8b01129

Cited by 101 publications

(49 citation statements)

References 57 publications

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“…3b and Supplementary Fig. 6a, b) suggest that the C shell having a thickness of 5–8 nm is amorphous and the lattice distance of 0.31 nm corresponds to the d -spacing of the (111) planes of crystalline Si 25,28 . EDS mapping (Fig.…”

Section: Resultsmentioning

confidence: 96%

Scalable synthesis of ant-nest-like bulk porous silicon for high-performance lithium-ion battery anodes

et al. 2019

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Although silicon is a promising anode material for lithium-ion batteries, scalable synthesis of silicon anodes with good cyclability and low electrode swelling remains a significant challenge. Herein, we report a scalable top-down technique to produce ant-nest-like porous silicon from magnesium-silicon alloy. The ant-nest-like porous silicon comprising three-dimensional interconnected silicon nanoligaments and bicontinuous nanopores can prevent pulverization and accommodate volume expansion during cycling resulting in negligible particle-level outward expansion. The carbon-coated porous silicon anode delivers a high capacity of 1,271 mAh g −1 at 2,100 mA g −1 with 90% capacity retention after 1,000 cycles and has a low electrode swelling of 17.8% at a high areal capacity of 5.1 mAh cm −2 . The full cell with the prelithiated silicon anode and Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 cathode boasts a high energy density of 502 Wh Kg −1 and 84% capacity retention after 400 cycles. This work provides insights into the rational design of alloy anodes for high-energy batteries.

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Section: Resultsmentioning

confidence: 96%

Scalable synthesis of ant-nest-like bulk porous silicon for high-performance lithium-ion battery anodes

et al. 2019

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“…Due to the large particle size (≈20 µm) and relatively high tap density (0.9 g cm −3 ), the D-Si-6 electrode presented a high volumetric capacity of ≈1400 mAh cm −3 at 0.1C with a mass loading of 1.6 mg cm −2 ( Figure S9, Supporting Information) (corresponding to a gravimetric capacity of ≈1000 mAh g −1 and electrode thickness of 11.3 µm, Figure S10, Supporting Information), much higher than that of commercial graphite anode (≈600 mAh cm −3 ). [12] Figure S11, Supporting Information summarizes the volumetric capacities, and Table S3, Supporting Information lists electrochemical performance of high-performance Si anodes reported recently [39][40][41][42][43][44][45][46] for further comparison. Among these state-of-theart electrodes, the diatomite Si exhibited the superior volumetric capacity, 1st cycle CE and capacity retention.…”

Section: (6 Of 10)mentioning

confidence: 99%

Diatomite‐Derived Hierarchical Porous Crystalline‐AmorphousNetwork for High‐Performance and Sustainable Si Anodes

Zhang

Chen

et al. 2020

Adv Funct Materials

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Silicon has attracted considerable interest as a high-capacity anode material for next-generation lithium-ion batteries. However, Si-based anodes suffer extreme volume change (≈380%) upon lithiation and delithiation, which results in rapid capacity fading due to mechanical and electrochemical failure during cycling. Herein, a sustainable and scalable method to synthesize hierarchically porous micron-sized Si particles from the low-cost diatomite precursor is reported, which serves as both the precursor and the template. Through a one-step magnesiothermic reduction, the SiO 2 constituent in diatomite is reduced to form a Si/SiO 2 composite network with 10-30 nm crystalline Si domains embedded within an amorphous SiO 2 matrix. Controlling the reduction time leads to an optimal ratio between the crystalline Si and the amorphous SiO 2 constituent, which endows the composite structure with high capacity and excellent cycling stability. For example, 90% capacity can be retained after 500 cycles at 0.2C for sample reduced by 6 h without any coating or prelithiation. The full cell with such Si/SiO 2 as the anode and LiNi 0.8 Co 0.1 Mn 0.1 O 2 as the cathode shows ≈80% capacity retention after 200 cycles. This work creates a unique path towards sustainable and scalable production of high-performance micron-sized Si anodes, offering new opportunities for potential industrial applications.

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“…On the contrary, the SC‐1/30 has a moderate initial CE of 60%, while the SC‐1/5 and SC‐1/15 show the highest initial CE around 64%. The plateau appears around 0.7 V in the first discharge curves is caused by the decomposition of electrolyte and the formation of SEI film . Correspondingly, an obvious reduction peak around 0.5–0.8 V is observed in the first cycle of the CV curves (Figure c–f).…”

Section: Resultsmentioning

confidence: 81%

Silica/Carbon Composites with Controllable Nanostructure from a Facile One‐Step Method for Lithium‐Ion Batteries Application

Yang

Zhang

et al. 2019

Adv Materials Inter

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capacity of 1965 mAh g −1 . [7,8] What's more, the silicate and Li 2 O produced during the lithium storage process are advantageous to buffer the volume change, thus enhancing the cycling stability of the electrodes. [5,9] However, the intrinsic drawbacks of low electrical conductivity and high ion-migrating resistivity in bulk SiO 2 restrict its application in LIBs greatly. [4,[9][10][11] Fortunately, the much simpler preparation procedure and structure design of synthetic SiO 2 compared with that of Si offer us the possibility to develop a well-defined form of SiO 2 for LIBs application. [4,10] The most common method is reducing the SiO 2 size to a nanoscale range and coupling it with carbon materials, [6][7][8][9][10][11][12][13] which can minimize the Li + migrating path and enhance the conductivity of the electrodes, respectively. For example, An [7] prepared carbon-coated mesoporous hollow SiO 2 nanospheres via a two-step method. The results showed that the carbon shell could endure the volume expansion of SiO 2 and stabilize the solid electrolyte interface (SEI) film, thus giving rise to a larger reversible capacity of 440.7 mAh g −1 and perfect cycling ability. Meng [6] designed a kind of 3D amorphous SiO 2 @graphene aerogel through a hydrothermal method, and it delivered a specific capacity of 300 mAh g −1 , excellent cycling stability, and good rate capability, which were ascribed to the 3D nanostructure and the coupling of graphene.Nevertheless, to our knowledge, these strategies can be classified into two types: two-step method by preparing nanoscale SiO 2 particles and then coupling them with carbon frameworks [4,[6][7][8][9][10] ; electrospinning method or hydrothermal method by mixing the silica source (such as TEOS and tetramethoxysilane) with carbon source in a homogeneous solution. [11,12] These strategies exhibit obvious defects: 1) tedious and time-consuming procedures in two-step methods; 2) inhomogeneous nanostructure: carbon layers may stack into carbon bulks during the dipping-carbonizing process, and the inside SiO 2 particles tend to aggregate into larger particles at a relatively high SiO 2 content; 3) limitation of the performance optimization owing to the uncontrollable nanostructure.Therefore, in this work, we develop a new class of porous silica/carbon (S/C) composites with controllable nanostructure via a mild one-step sol-gel method (Figure 1). This idea comes from a well-known mechanism that hydrofluoric acid (HF) can Nanosized silica is drawing attentions in lithium-ion batteries because of its better cycling stability and lower cost compared to silicon. However, significant challenges appear at the uncontrollable and inhomogeneous nanostructure while coupling silica with carbon. Herein, a series of silica/carbon (S/C) composites with tunable nanostructure are developed based on the mechanism that hydrofluoric acid (HF) can control the gelating process of tetraethylorthosilicate (TEOS). By changing the HF/TEOS ratio, the size of the silica skeleton, surface area and porosity of...

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Zeolite-Templated Mesoporous Silicon Particles for Advanced Lithium-Ion Battery Anodes

Cited by 101 publications

References 57 publications

Scalable synthesis of ant-nest-like bulk porous silicon for high-performance lithium-ion battery anodes

Scalable synthesis of ant-nest-like bulk porous silicon for high-performance lithium-ion battery anodes

Diatomite‐Derived Hierarchical Porous Crystalline‐AmorphousNetwork for High‐Performance and Sustainable Si Anodes

Silica/Carbon Composites with Controllable Nanostructure from a Facile One‐Step Method for Lithium‐Ion Batteries Application

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