Subscribe to our free daily newsletters
  Energy News  




Subscribe to our free daily newsletters



ENERGY TECH
Super P carbon black for reversible lithium and sodium ion storage
by Staff Writers
Beijing, China (SPX) May 04, 2017


illustration only

Nowadays lithium ion batteries play a dominant role in the rechargeable battery market. Sodium ion batteries have recently attracted increasing interest as an alternative to lithium ion batteries due to the high natural abundance of sodium compared to lithium.

Super P carbon black (SPCB), produced from partial oxidation of petrochemical precursors exhibiting a large specific surface area and superb electrical conductivity, is the most commonly used conducting additive in the lithium/sodium ion battery electrodes to improve the electronic conductivity. However, very limited knowledge on the structure, electrochemical properties and reaction mechanisms for lithium/sodium ion uptake has been reported till now.

In an article coauthored by researchers at Delft University of Technology, Renmin University of China and the National Center for Nanoscience and Technology of China, a comprehensive study on the structure and electrochemical properties of SPCB has been reported. The article titled "The electrochemical performance of super p carbon black in reversible Li/Na ion uptake" has been recently published in the journal Science China Physics, Mechanics and Astronomy.

To uncover the structure and morphology of SPCB, these researchers utilized scanning electron microscopy (SEM), Raman spectroscopy and X-ray diffraction (XRD). The SPCB appears as porous, flocculent, cross-linked carbon nanothreads; it is largely amorphous and contains substantial structural disorder, i.e. low graphitization level.

The electrochemical performance of SPCB (Figure 1) shows that SPCB exhibits a considerable capacity for both lithium and sodium ion storages, a high cycling stability and excellent rate capability. It is demonstrated that SPCB achieves a higher capacity for lithium ion than sodium ion storage. A reversible capacity (up to 310 mAh g?1) was reported for lithium ion uptake, while 145 mAh g?1 was achieved for sodium ion storage. The authors ascribe it to the different reaction mechanisms between lithiation and sodiation of SPCB.

The lithium ions are intercalated in the graphite structure of SPCB forming graphite intercalation compounds (GICs), which is, however, not favorable for sodium ion insertion. This article indicates that, due to the low graphitization level of SPCB, sodium ion uptake in SPCB may follow the "card-house" model in which two stages are present: sodium ion intercalation in the layers between the graphene sheets and sodium plating in the pores between the nano-graphitic domains.

The work has also, for the first time, investigated the influence of binder type and content on the electrochemical lithiation and sodiation performance of SPCB. The water-soluble NaCMC binder based electrodes shows a superior cycling stability compared to the electrodes using the mainstream binder in battery research and commercial products, PVDF.

"This can be probably attributed to not only the superior adhesive quality and elasticity of NaCMC but the formation of a more compact SEI layer upon the presence of FEC in the electrolyte", they explained, which helps to maintain the structural integrity during cycling and thus to achieve a higher cycling stability.

Meanwhile, this article demonstrates that the Coulombic efficiency increases with higher binder content in the electrode; increasing binder amount also leads to the better retained structural integrity during cycling.

The lithium ion insertion and extraction in SPCB mainly occurs at a low voltage range showing a sloping voltage < 1.2 V; while the de-/sodiation takes place at an even lower voltage range < 0.8 V. The sodiation voltage profile has a relatively higher voltage slope and a voltage plateau close to 0 vs. Na/Na+, which is consistent with the Na ion insertion following the "card-house" model.

"The consequence of the sloping voltage profiles", wrote the researchers, "will be that in a low potential lithium/sodium ion anode (e.g. Li-Si or Na-P using SPCB as a conducting additive) the SPCB will largely be lithiated or sodiated at a higher potential than where the main lithiation or sodiation of the active materials takes place. For higher potential anodes (such as Li4Ti5O12) or cathodes no lithiation or sodiation of SPCB will take place."

Providing the common utilization of SPCB in battery research, the researchers stated, "The electrochemical lithium/sodium ion uptake properties of SPCB reported in this article will provide an essential reference for the research on lithium and sodium ion battery electrodes that utilize significant amounts of SPCB as a conductive additive".

B. Peng, Y. Xu, X. Wang, X. Shi, and F. M. mulder, The electrochemical performance of super P carbon black in reversible Li/Na ion uptake, Sci. China-Phys. Mech. Astron. 60, 064611 (2017), doi: 10.1007/s11433-017-9022-y

ENERGY TECH
New breakthrough in battery charging technology
Ulsan, South Korea (SPX) May 03, 2017
A team of researchers, affiliated with UNIST has developed a single-unit, photo-rechargeable portable power source based on high-efficiency silicon solar cells and lithium-ion batteries (LIBs). This newly-developed power source is designed to work under sunlight and indoor lighting, allowing users to power their portable electronics anywhere with access to light. In addition, the new device coul ... read more

Related Links
Science China Press
Powering The World in the 21st Century at Energy-Daily.com


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

ENERGY TECH
U.S. emissions generally lower last year

World Bank urges more investment for developing global electricity

US states begin legal action on Trump energy delay

Program to be axed saves energy in LA buildings

ENERGY TECH
Super P carbon black for reversible lithium and sodium ion storage

Revolutionary method reveals impact of short circuits on battery safety

New breakthrough in battery charging technology

Freezing lithium batteries may make them safer and bendable

ENERGY TECH
U.S. wind power accelerating at near-record pace

CEE Group acquires wind farm with a capacity of 27.6 megawatts in Brandenburg

Norwegian company envisions wind energy role for oil production

Oklahoma to end tax credits for wind energy

ENERGY TECH
Photoluminescent display absorbs, converts light into energy

Indian Space Agency Test-Drives Solar Electric Hybrid Vehicle

U.S. renewable power groups defend reliability

Renewable sources now almost one-fifth of US generating capacity

ENERGY TECH
Ukraine clings to nuclear power despite Chernobyl trauma

Court deals setback to South Africa's nuclear ambitions

Andra continues Areva contract to operate its Aube Surface Disposal Facility

The critical importance of Predictive Power when building NPPs

ENERGY TECH
Turning chicken poop and weeds into biofuel

Nickel: A greener route to fatty acids

Scientists develop efficient multifunctional catalyst for CO2 hydrogenation to gasoline

Fast, low energy, and continuous biofuel extraction from microalgae

ENERGY TECH
Pentagon concerned about lifting offshore drilling moratorium

State-wide inspections follow fatal Colorado gas explosion

Chinese energy companies looking for offshore foothold

How fluids flow through shale

ENERGY TECH
US may stay in Paris climate accord, with caveats

Ethiopia drought creates food crisis for 7.7 million

US may stay in Paris climate accord, with caveats

UNEP chief confident US will not ditch Paris climate deal




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement