Nav: Home

New technology for pre-replenishing lithium for lithium ion supercapacitors

January 14, 2020

Lithium nitride is a well-known positive pre-lithiation additive that can be used to compensate for the irreversible lithium loss that occurs on the negative side during the first charge, thereby increasing the specific energy of the energy storage device. However, in the electrode manufacturing process, lithium nitride would react with the most commonly used solvent, such as N-methyl-2-pyrrolidone (NMP), dimethyl sulfoxide (DMSO), acetonitrile (ACN) and N,N-dimethylacetamide (DMAC). The side reactions make it difficult to manufacture the lithium nitride containing electrode in scale. In this work, it was found that N,N-dimethylformamide (DMF) can be used as a homogenizing solvent to prepare a stable lithium nitride-containing slurry and electrode. Then the problem is solved.

The electrode can realize pre-lithiation of the lithium ion supercapacitor negative electrode, greatly improve the specific energy of the device, and maintain excellent rate performance and cycle stability. The energy retention remains 90% after 10,000 cycles. This technology is expected to find application in other battery systems with low initial efficiency in anode (hard carbon, silicon, etc.)

This work was reported in Science Bulletin, entitled "DMF stabilized Li3N slurry for manufacturing self-prelithiatable lithium-ion capacitor" by Prof. Zhang Hongzhang and Li Xianfeng's group in Dalian Institute of Chemical Physics, Chinese Academy of Sciences. The researchers studied the common polar solvents and found that the presence of α-H is the main factor affecting the instability of the solvent on the surface of lithium nitride.
The research was supported by the National Natural Science Foundation of China (51673199 and 51677176), Youth Innovation Promotion Association of Chinese Academy of Sciences (2015148), Dalian National Laboratory for Clean Energy (DNL180307), Innovation Foundation of Dalian Institute of Chemical Physics, Chinese Academy of Sciences (ZZBS201615 and ZZBS201708), and Dalian Science and Technology Star Program (2016RQ026).

See the article:

Cuilian Liu, Tianyu Li, Hongzhang Zhang, Zihan Song, Chao Qu, Guangjin Hou, Huamin Zhang, Chuanfa Ni, Xianfeng Li. DMF stabilized Li3N slurry for manufacturing self-prelithiatable lithium-ion capacitors. Science Bulletin, 2019, doi: 10.1016/j.scib.2019.11.014

Science China Press

Related Technology Articles:

Technology innovation for neurology
TU Graz researcher Francesco Greco has developed ultra-light tattoo electrodes that are hardly noticeable on the skin and make long-term measurements of brain activity cheaper and easier.
April's SLAS Technology is now available
April's Edition of SLAS Technology Features Cover Article, 'CURATE.AI: Optimizing Personalized Medicine with Artificial Intelligence'.
Technology in higher education: learning with it instead of from it
Technology has shifted the way that professors teach students in higher education.
Post-lithium technology
Next-generation batteries will probably see the replacement of lithium ions by more abundant and environmentally benign alkali metal or multivalent ions.
Rethinking the role of technology in the classroom
Introducing tablets and laptops to the classroom has certain educational virtues, according to Annahita Ball, an assistant professor in the University at Buffalo School of Social Work, but her research suggests that tech has its limitations as well.
The science and technology of FAST
The Five hundred-meter Aperture Spherical radio Telescope (FAST), located in a radio quiet zone, with the targets (e.g., radio pulsars and neutron stars, galactic and extragalactic 21-cm HI emission).
AI technology could help protect water supplies
Progress on new artificial intelligence (AI) technology could make monitoring at water treatment plants cheaper and easier and help safeguard public health.
Transformative technology
UC Davis neuroscientists have developed fluorescence sensors that are opening a new era for the optical recording of dopamine activity in the living brain.
Do the elderly want technology to help them take their medication?
Over 65s say they would find technology to help them take their medications helpful, but need the technology to be familiar, accessible and easy to use, according to research by Queen Mary University of London and University of Cambridge.
Technology detecting RNase activity
A KAIST research team of Professor Hyun Gyu Park at Department of Chemical and Biomolecular Engineering developed a new technology to detect the activity of RNase H, a RNA degrading enzyme.
More Technology News and Technology Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Our Relationship With Water
We need water to live. But with rising seas and so many lacking clean water – water is in crisis and so are we. This hour, TED speakers explore ideas around restoring our relationship with water. Guests on the show include legal scholar Kelsey Leonard, artist LaToya Ruby Frazier, and community organizer Colette Pichon Battle.
Now Playing: Science for the People

#568 Poker Face Psychology
Anyone who's seen pop culture depictions of poker might think statistics and math is the only way to get ahead. But no, there's psychology too. Author Maria Konnikova took her Ph.D. in psychology to the poker table, and turned out to be good. So good, she went pro in poker, and learned all about her own biases on the way. We're talking about her new book "The Biggest Bluff: How I Learned to Pay Attention, Master Myself, and Win".
Now Playing: Radiolab

First things first: our very own Latif Nasser has an exciting new show on Netflix. He talks to Jad about the hidden forces of the world that connect us all. Then, with an eye on the upcoming election, we take a look back: at two pieces from More Perfect Season 3 about Constitutional amendments that determine who gets to vote. Former Radiolab producer Julia Longoria takes us to Washington, D.C. The capital is at the heart of our democracy, but it's not a state, and it wasn't until the 23rd Amendment that its people got the right to vote for president. But that still left DC without full representation in Congress; D.C. sends a "non-voting delegate" to the House. Julia profiles that delegate, Congresswoman Eleanor Holmes Norton, and her unique approach to fighting for power in a virtually powerless role. Second, Radiolab producer Sarah Qari looks at a current fight to lower the US voting age to 16 that harkens back to the fight for the 26th Amendment in the 1960s. Eighteen-year-olds at the time argued that if they were old enough to be drafted to fight in the War, they were old enough to have a voice in our democracy. But what about today, when even younger Americans are finding themselves at the center of national political debates? Does it mean we should lower the voting age even further? This episode was reported and produced by Julia Longoria and Sarah Qari. Check out Latif Nasser's new Netflix show Connected here. Support Radiolab today at