Tin nanoparticles embedded in a carbon buffer layer as preferential nucleation sites for stable sodium metal anodes

2019 ◽  
Vol 7 (41) ◽  
pp. 23747-23755 ◽  
Author(s):  
Huan Wang ◽  
Edward Matios ◽  
Chuanlong Wang ◽  
Jianmin Luo ◽  
Xuan Lu ◽  
...  
Keyword(s):  
Buffer Layer ◽  
High Capacity ◽  
Sodium Metal ◽  
Tin Nanoparticles ◽  
Nucleation Sites ◽  
Preferential Nucleation ◽  
Carbon Network ◽  
Metal Anodes

High-capacity sodium anodes with long-term reversibility and stability are presented by synthesizing tin nanoparticles homogeneously embedded within a conductive carbon network.

scholarly journals Wire-in-Wire TiO2/C Nanofibers Free-Standing Anodes for Li-Ion and K-Ion Batteries with Long Cycling Stability and High Capacity

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Die Su ◽  
Yi Pei ◽  
Li Liu ◽  
Zhixiao Liu ◽  
Junfang Liu ◽  
...  
Keyword(s):  
Critical Role ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
High Capacity ◽  
Cycling Stability ◽  
Free Standing ◽  
High Specific Capacity ◽  
Tetracarboxylic Dianhydride ◽  
Carbon Network

AbstractWearable and portable mobile phones play a critical role in the market, and one of the key technologies is the flexible electrode with high specific capacity and excellent mechanical flexibility. Herein, a wire-in-wire TiO2/C nanofibers (TiO2 ww/CN) film is synthesized via electrospinning with selenium as a structural inducer. The interconnected carbon network and unique wire-in-wire nanostructure cannot only improve electronic conductivity and induce effective charge transports, but also bring a superior mechanic flexibility. Ultimately, TiO2 ww/CN film shows outstanding electrochemical performance as free-standing electrodes in Li/K ion batteries. It shows a discharge capacity as high as 303 mAh g−1 at 5 A g−1 after 6000 cycles in Li half-cells, and the unique structure is well-reserved after long-term cycling. Moreover, even TiO2 has a large diffusion barrier of K+, TiO2 ww/CN film demonstrates excellent performance (259 mAh g−1 at 0.05 A g−1 after 1000 cycles) in K half-cells owing to extraordinary pseudocapacitive contribution. The Li/K full cells consisted of TiO2 ww/CN film anode and LiFePO4/Perylene-3,4,9,10-tetracarboxylic dianhydride cathode possess outstanding cycling stability and demonstrate practical application from lighting at least 19 LEDs. It is, therefore, expected that this material will find broad applications in portable and wearable Li/K-ion batteries.

scholarly journals Realizing high-power and high-capacity zinc/sodium metal anodes through interfacial chemistry regulation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhen Hou ◽  
Yao Gao ◽  
Hong Tan ◽  
Biao Zhang
Keyword(s):  
High Power ◽  
High Capacity ◽  
Interfacial Chemistry ◽  
Zinc Deposition ◽  
Metal Anode ◽  
Face To Face ◽  
Sodium Metal ◽  
Current Densities ◽  
Superior Cycling Stability ◽  
Metal Anodes

AbstractStable plating/stripping of metal electrodes under high power and high capacity remains a great challenge. Tailoring the deposition behavior on the substrate could partly resolve dendrites’ formation, but it usually works only under low current densities and limited capacities. Here we turn to regulate the separator’s interfacial chemistry through tin coating with decent conductivity and excellent zincophilicity. The former homogenizes the electric field distribution for smooth zinc metal on the substrate, while the latter enables the concurrent zinc deposition on the separator with a face-to-face growth. Consequently, dendrite-free zinc morphologies and superior cycling stability are achieved at simultaneous high current densities and large cycling capacities (1000 h at 5 mA/cm2 for 5 mAh/cm2 and 500 h at 10 mA/cm2 for 10 mAh/cm2). Furthermore, the concept could be readily extended to sodium metal anodes, demonstrating the interfacial chemistry regulation of separator is a promising route to circumvent the metal anode challenges.

A facile method to stabilize sodium metal anodes towards high-performance sodium batteries

2021 ◽  
Vol 9 (14) ◽  
pp. 9038-9047
Author(s):  
Qiongqiong Lu ◽  
Ahmad Omar ◽  
Ling Ding ◽  
Steffen Oswald ◽  
Martin Hantusch ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Sodium Metal ◽  
Sodium Batteries ◽  
Metal Anodes

Protected Na anodes fabricated by 1,3-dioxolane pretreatment showed long-term cycling in symmetric cells and improved electrochemical performance in full cells.

Lightweight, Thin, and Flexible Silver Nanopaper Electrodes for High‐Capacity Dendrite‐Free Sodium Metal Anodes

2018 ◽  
Vol 28 (48) ◽  
pp. 1804038 ◽  
Author(s):  
Zhaohui Wang ◽  
Xiaoliang Zhang ◽  
Shengyang Zhou ◽  
Kristina Edström ◽  
Maria Strømme ◽  
...  
Keyword(s):  
High Capacity ◽  
Sodium Metal ◽  
Metal Anodes

Nanocrevass-Rich Carbon Fibers for Stable Lithium and Sodium Metal Anodes

2018 ◽  
Author(s):  
Wooseok Go ◽  
Min-Ho Kim ◽  
Jehee Park ◽  
Chek Hai Lim ◽  
Youngsik Kim ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Sodium Metal ◽  
Metal Anodes

Thin buffer layer assist carbon-modifying separator for long-life lithium metal anodes

2020 ◽  
Author(s):  
Jiaqi Li ◽  
Hongsheng Jia ◽  
Haibo Li ◽  
Xing Zhao ◽  
Guiru Sun ◽  
...  
Keyword(s):  
Buffer Layer ◽  
Lithium Metal ◽  
Lithium Metal Anodes ◽  
Long Life ◽  
Metal Anodes

Performance analysis of hybrid Fi-Wi network employing OCDMA based NG-PON

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Priyadharshini Rajasekaran ◽  
Geetha Ganesan ◽  
Meenakshi Murugappan
Keyword(s):  
Optical Network ◽  
High Capacity ◽  
Passive Optical Network ◽  
Error Vector Magnitude ◽  
Broadband Wireless ◽  
M Sequence ◽  
Integrated Architecture ◽  
Multiple Services ◽  
Code Division Multiple

Abstract Fiber-Wireless (Fi-Wi) networks play a crucial role in broadband wireless communication. A hybrid Fi-Wi architecture integrating Optical Code Division Multiple Access (OCDMA) based Next-Generation Passive Optical Network (NGPON) with Long Term Evolution (LTE) is proposed that can provide a higher capacity to the mobile end users, thereby achieving scalability and mobility. Maximal length sequence (M-sequence) codes of code length 31 used can support six users. A simulation study is carried out for the proposed integrated architecture considering multiple users and multiple services, and the performance is analyzed in terms of the received Bit Error Rate (BER) and Error Vector Magnitude (EVM) values. A high capacity of 160 Gbps and a spectral efficiency of 2–4 bps/Hz are achieved for the multi-user and multi-service links with six users.

scholarly journals Transport and accumulation of heavy metals in undisturbed soil columns

2013 ◽  
Vol 9 (3) ◽  
pp. 187-194
Keyword(s):  
Heavy Metals ◽  
Kola Peninsula ◽  
Forest Floor ◽  
High Capacity ◽  
Soil Columns ◽  
Undisturbed Soil ◽  
Podzolic Soils ◽  
Floor Layer

The podzolic soils of the Kola Peninsula, Russia, have in localised areas been highly contaminated with copper and nickel from smelting activities. Migration and retention of these metals were investigated in undisturbed soil columns irrigated with simulated background and polluted precipitation in order to study the temporal processes of retention and release within the soil. The mineral layers were strongly acidified by the contaminated precipitation. Forest floor layers demonstrated a high capacity to retain input Ni and Cu under all conditions. Mineral layers accumulated some Cu, but released Ni. In general, Ni leached through the soil faster than Cu. Since metals are strongly retained in the forest floor layer, even after reduction or cessation of inputs there may be a significant long–term risk of their leaching to deeper soil and groundwater. This risk cannot be ameliorated without remediative intervention.

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