Copper-Nanoparticle-Induced Porous Si/Cu Composite Films as an Anode for Lithium Ion Batteries

Lin, Lin; Ma, Yating; Xie, Qingshui; Wang, Laisen; Zhang, Qinfu; Peng, Dong‐Liang

doi:10.1021/acsnano.7b02030

Cited by 81 publications

(49 citation statements)

References 46 publications

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“…So, during subsequent delithiation process, the opposite direction electric field from the oxygen vacancies center to the electroneutral region would promote the migration and the deintercalation of lithium ions in the same way (Figure f). In order to validate this point more clearly, the Li + diffusion coefficients of all three samples are calculated according to the Warburg impedance data . As demonstrated in Figure c, the Li + diffusion coefficients of ZMCG, ZMC, and ZZMO are estimated to be 1.38 × 10 −4 , 1.82 × 10 −5 , and 0.85 × 10 −5 cm 2 s −1 , respectively, indicating the greatly enhanced lithium ions transport of ZMCG.…”

Section: Resultsmentioning

confidence: 86%

Dual Electrostatic Assembly of Graphene Encapsulated Nanosheet‐Assembled ZnO‐Mn‐C Hollow Microspheres as a Lithium Ion Battery Anode

Xie

Liu

Zeng

et al. 2018

Adv Funct Materials

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Graphene encapsulated nanosheet-assembled ZnO-Mn-C hierarchical hollow microspheres are produced through a simple yet effective dual electrostatic assembly strategy, followed by a heating treatment in inert atmosphere. The modification of graphene sheets, metal Mn, and in situ carbon leads to form 3D interconnected conductive framework as electron highways. The hollow structure and the open configuration of hierarchical microspheres guarantee good structural stability and rapid ionic transport. More importantly, according to the density functional theory calculations, the oxygen vacancies in the hierarchical microspheres would cause an imbalanced charge distribution and thus the formation of local in-plane electric fields around oxygen vacancy sites, which is beneficial for the ionic/electronic transport during cycling. Due to this multiscale coordinated design, the as-fabricated graphene encapsulated nanosheet-assembled ZnO-Mn-C hierarchical hollow microspheres demonstrate good lithium storage properties in terms of high reversible capacity (1094 mA h g −1 at 100 mA g −1 ), outstanding high-rate long-term cycling stability (843 mA h g −1 after 1000 cycles at 2000 mA g −1 ), and remarkable rate capability (422 mA h g −1 after total 1600 cycles at 5000 mA g −1 ).

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Section: Resultsmentioning

confidence: 86%

Dual Electrostatic Assembly of Graphene Encapsulated Nanosheet‐Assembled ZnO‐Mn‐C Hollow Microspheres as a Lithium Ion Battery Anode

Xie

Liu

Zeng

et al. 2018

Adv Funct Materials

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“…This phenomenon can be attributed to the formed inactive metal matrix that surrounds the active metal matrix and supports it to maintain its structural integrity during the lithium insertion/extraction process. Lin et al [26] report Cu nanoparticle-induced Si composite films, which exhibited excellent cycling performance and rate capability compared to pure Si films. Kim et al [27] synthesized Al-doped Si films with improved electrochemical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cobalt Doping on Enhanced Lithium Storage Performance of Nanosilicon

Nulu

Sohn

2021

ChemElectroChem

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High-capacity silicon anodes are attracting more attention, owing to their high theoretical capacities and low working potentials. However, massive volume changes and low intrinsic electric conductivity remain substantial challenges that limit the practical applications of these anodes in lithium-ion batteries (LIBs). In this study, cobalt-doped silicon nanoparticles with different Co concentrations (0.1 %, 0.3 %, and 0.5 %) are prepared by using a simple low-temperature annealing process and are studied as anodes for LIBs. Compared to pure silicon, the obtained 0.5 % cobalt-doped silicon anode can serve as a promising anode and shows a high discharge capacity of 3409 mAh g À 1 (97.2 % capacity retention vs. first reversible capacity) with 98.1 % coulombic efficiency after 40 cycles, at 200 mA g À 1 . After a long 320 cycles, the electrode delivered 3029 mAh g À 1 with 86.4 % capacity retention. This cobalt-doped silicon anode also exhibits superior rate capability and a highly stable long cycle life at higher current densities as well as high mass loading. These remarkable enhancements in electrochemical properties indicate that cobalt doping yields increased conductivity, mitigates volume expansion, and provides shorter lithium transportation lengths across the silicon nanoparticles.

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“…All the anodes showed large capacities around 3000 mAh g −1 at 0.02 C, which maintained over 1000 mAh g −1 at 1 C. The area capacity achieved 1.93 mAh cm −2 at 0.02 C with a mass loading of 0.78 mg cm −2 and the capacity retention was over 92% after 100 cycles at 1 C, showing an improved electrochemical performance with a high mass loading compared to previously reported studies. [ 27,39,40 ] Generally, the high mass loading of 1D nano‐sized Si anode is realized through increasing the anode thickness, which often leads to rapid capacity fading. [ 10 ] The secondary dendrites of the branched Si, which improved the mass loading without significantly increasing the anode thickness, were contributed to the enhancement on the capacity as well as the structure stability.…”

Section: Resultsmentioning

confidence: 99%

Facile and Efficient Fabrication of Branched Si@C Anode with Superior Electrochemical Performance in LIBs

Cao

Huang

Cui

et al. 2021

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One‐dimensional Si nanostructures with carbon coating (1D Si@C) show great potential in lithium ion batteries (LIBs) due to small volume expansion and efficient electron transport. However, 1D Si@C anode with large area capacity still suffers from limited cycling stability. Herein, a novel branched Si architecture is fabricated through laser processing and dealloying. The branched Si, composed of both primary and interspaced secondary dendrites with diameters under 100 nm, leads to improved area capacity and cycling stability. By coating a carbon layer, the branched Si@C anode shows gravimetric capacity of 3059 mAh g−1 (1.14 mAh cm−2). At a higher rate of 3 C, the capacity is 813 mAh g−1, which retained 759 mAh g−1 after 1000 cycles at 1 C. The area capacity is further improved to 1.93 mAh cm−2 and remained over 92% after 100 cycles with a mass loading of 0.78 mg cm−2. Furthermore, the full‐cell configuration exhibits energy density of 405 Wh kg−1 and capacity retention of 91% after 200 cycles. The present study demonstrates that laser‐produced dendritic microstructure plays a critical role in the fabrication of the branched Si and the proposed method provides new insights into the fabrication of Si nanostructures with facility and efficiency.

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Copper-Nanoparticle-Induced Porous Si/Cu Composite Films as an Anode for Lithium Ion Batteries

Cited by 81 publications

References 46 publications

Dual Electrostatic Assembly of Graphene Encapsulated Nanosheet‐Assembled ZnO‐Mn‐C Hollow Microspheres as a Lithium Ion Battery Anode

Dual Electrostatic Assembly of Graphene Encapsulated Nanosheet‐Assembled ZnO‐Mn‐C Hollow Microspheres as a Lithium Ion Battery Anode

Effect of Cobalt Doping on Enhanced Lithium Storage Performance of Nanosilicon

Facile and Efficient Fabrication of Branched Si@C Anode with Superior Electrochemical Performance in LIBs

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