Hollow core–shell structured silicon@carbon nanoparticles embed in carbon nanofibers as binder-free anodes for lithium-ion batteries

Chen, Yanli; Hu, Yi; Shen, Zhen; Chen, Renzhong; He, Xia; Zhang, Xiangwu; Li, Yongqiang; Wu, Keshi

doi:10.1016/j.jpowsour.2016.12.089

Cited by 109 publications

(50 citation statements)

References 44 publications

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“…[100,101] Since the metal current collector on the anode side is usually a 10 µm thick copper foil with an areal density ≈10 mg cm −2 , which is much larger in weight than silicon active materials, there are many research progresses to avoid the use of heavy current collector to enhance the overall gravimetric energy density. [102,103] On the other hand, reports on freestanding or binder-free electrode structures should also mention the electrode thickness and areal capacity, for comprehensive evaluation of the pros and cons. Even though there is still much room to further improve the areal capacity; freestanding or binder-free electrode structures also show great potential application in flexible devices.…”

Section: Discussionmentioning

confidence: 99%

Challenges and Recent Progress in the Development of Si Anodes for Lithium‐Ion Battery

Jin

Zhu

et al. 2017

Advanced Energy Materials

745

574

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Silicon, because of its high specific capacity, is intensively pursued as one of the most promising anode material for next‐generation lithium‐ion batteries. In the past decade, various nanostructures are successfully demonstrated to address major challenges for reversible Si anodes related to pulverization and solid‐electrolyte interphase. However, the electrochemical performance is still limited by challenges that stem from the use of nanomaterials. In this progress report, the focus is on the challenges and recent progress in the development of Si anodes for lithium‐ion battery, including initial Coulombic efficiency, areal capacity, and material cost, which call for more research effort and provide a bright prospect for the widespread applications of silicon anodes in the future lithium‐ion batteries.

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Section: Discussionmentioning

confidence: 99%

Challenges and Recent Progress in the Development of Si Anodes for Lithium‐Ion Battery

Jin

Zhu

et al. 2017

Advanced Energy Materials

745

574

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“…[1][2][3][4] Since silicon (Si) electrode provides high theoretical capacity (3579 mAh g −1 if Li 15 Si 4 for room temperature lithiation) [1][2][3][4] Since silicon (Si) electrode provides high theoretical capacity (3579 mAh g −1 if Li 15 Si 4 for room temperature lithiation) …”

Section: Introductionmentioning

confidence: 99%

“…[5] However, Si anode have fast failure problems of structure degradation, unsatisfactory coulombic efficiency (CE), and rapid capacity fading due to the large volume variation (≈300%) and unstable solid-electrolyte interphase (SEI) during alloying/dealloying process. [15][16][17][18] 3) Using additives in the electrolyte to stabilize the SEI. 1) Building various Si nanostructures to solve the volume expansion problem.…”

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confidence: 99%

Artificial Solid Electrolyte Interphase Coating to Reduce Lithium Trapping in Silicon Anode for High Performance Lithium‐Ion Batteries

Guo

et al. 2019

Adv Materials Inter

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with natural abundance and low discharge potential, it has been considered as one of the most promising candidate as next generation anode materials for LIBs. [5] However, Si anode have fast failure problems of structure degradation, unsatisfactory coulombic efficiency (CE), and rapid capacity fading due to the large volume variation (≈300%) and unstable solid-electrolyte interphase (SEI) during alloying/dealloying process. With the fundamental understanding of failure mechanisms of Si anode, different approaches have been investigated by researchers. 1) Building various Si nanostructures to solve the volume expansion problem. [6][7][8][9][10][11][12][13][14] 2) Developing different coating strategy to enhance its structural stability and reducing SEI formation. [15][16][17][18] 3) Using additives in the electrolyte to stabilize the SEI. [19,20] However, the cycling performance of Si anode still needs to be improved. The capacity decay of Si anode is generally ascribed to a combination of volume variation and SEI formation, and there are also evidences indicating that lithium trapping is also one of the important factors to affect the electrochemical performance of Si electrodes. [21][22][23] The lithium trapping causes capacity decay due to incomplete delithiation of Si during high rate cycling, leading to capacity decay and unsatisfactory columbic efficiency. Despite all these above, lithium trapping has received relatively little attention so far, and it requires further investigation.Here, we have designed a new Si@LiAlO 2 structure by synthesizing LiAlO 2 thin coating on Si nanoparticles. The LiAlO 2 coating serves as an artificial SEI film with better lithium-ion diffusivity than naturally formed SEI layer, which enhances the rate performance and reduces the lithium trapping. By carrying out in situ Raman measurements on the LiAlO 2 coated Si anode, we have investigated the alloying process of Si during lithiation and confirmed LiAlO 2 can enhance the alloying process during lithiation. Owing to the LiAlO 2 coating, the Si anode demonstrates a superior electrochemical performance, which presents a specific capacity of 2013 mAh g −1 at a current density of 1000 mAh g −1 and 1106 mAh g −1 at a current density of 4000 mA g −1 with a capacity retention of 90.9% after 500 cycles.The investigation indicates that lithium trapping in Si anode of lithiumion battery is one of the key factors to affect the coulombic efficiency and capacity decay during high rate cycling. Here, it is demonstrated that LiAlO 2 as an artificial solid electrolyte interphase (SEI) on commercial Si nanoparticles can effectively address the lithium trapping issues of Si anode to improve its electrochemical performance. By investigating the structure evolution of Si with in situ Raman and ex situ X-ray diffraction measurements, it is demonstrated that artificial solid electrolyte interphase layer significantly improves the kinetics of lithium alloying/dealloying process due to its better electrochemical performance comparing to the natural SE...

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“…Because of large reversible capacity, high output voltage, and long‐term cycling stability, lithium‐ion batteries have received great attention as one of the most outstanding representatives of secondary energy‐storage devices . In the past few decades, inorganic electrode materials, including carbon materials, metals, transition metal oxides/sulfides, and some nonmetallic elements, are dominated in commercial application and laboratory research. However, excessive use of inorganic materials leads to environment issues and resource shortage .…”

Section: Introductionmentioning

confidence: 99%

Conjugated NH₂‐Enhanced Cross‐Linked Polymer Anode for Lithium‐Ion Batteries with High Reversible Capacity and Superior Cycling Stability

Zhong

Cheng

et al. 2019

Energy Tech

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With a mass of heteroatom‐containing functional groups, organic electrodes have satisfactory capacities and some specific advantages compared with inorganic materials in lithium‐ion batteries, such as environmental friendliness, sustainability, and low cost. However, it is still challenging to explore novel organic materials incorporating simple production processwa, good electrolyte insolubility, high specific capacity, and long‐term cycling stability. Herein, a novel conjugated NH2‐enhanced polymer anode with rigid molecular framework by one‐step Friedel–Crafts cross‐linking of p‐phenylenediamine is synthesized. It is surprising to find that the conjugated NH2 greatly enhances the Li+ insertion reaction of benzene rings and endows cross‐linked p‐phenylenediamine (C‐PDA) with high reversible Li storage capacity. Furthermore, C‐PDA exhibits a rigid network‐like molecular structure, which effectively suppresses the dissolution in electrolyte and improves the cyclability. When used as an electrode in a lithium‐ion battery, the initial discharge and charge capacities of C‐PDA are as high as 1190 and 720 mAh g−1, respectively, and it delivers a stable capacity of 1200 mAh g−1 after cycling 100 times at 0.1 A g−1. Even cycling for 800 times at 1 A g−1, C‐PDA still retains a capacity of 454 mAh g−1, with a capacity retention of 89% (C800th/Cmax).

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Hollow core–shell structured silicon@carbon nanoparticles embed in carbon nanofibers as binder-free anodes for lithium-ion batteries

Cited by 109 publications

References 44 publications

Challenges and Recent Progress in the Development of Si Anodes for Lithium‐Ion Battery

Challenges and Recent Progress in the Development of Si Anodes for Lithium‐Ion Battery

Artificial Solid Electrolyte Interphase Coating to Reduce Lithium Trapping in Silicon Anode for High Performance Lithium‐Ion Batteries

Conjugated NH₂‐Enhanced Cross‐Linked Polymer Anode for Lithium‐Ion Batteries with High Reversible Capacity and Superior Cycling Stability

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Hollow core–shell structured silicon@carbon nanoparticles embed in carbon nanofibers as binder-free anodes for lithium-ion batteries

Cited by 109 publications

References 44 publications

Challenges and Recent Progress in the Development of Si Anodes for Lithium‐Ion Battery

Challenges and Recent Progress in the Development of Si Anodes for Lithium‐Ion Battery

Artificial Solid Electrolyte Interphase Coating to Reduce Lithium Trapping in Silicon Anode for High Performance Lithium‐Ion Batteries

Conjugated NH2‐Enhanced Cross‐Linked Polymer Anode for Lithium‐Ion Batteries with High Reversible Capacity and Superior Cycling Stability

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Product

Resources

About

Conjugated NH₂‐Enhanced Cross‐Linked Polymer Anode for Lithium‐Ion Batteries with High Reversible Capacity and Superior Cycling Stability