Nav: Home

Anions and cations in dual-ion batteries act like cowherd and weaver girl

March 28, 2019

Dual-ion batteries (DIBs), in which both cations and anions are involved in the electrochemical redox reaction, are one of the most promising candidates to meet the low-cost requirements of commercial applications. Compared with conventional lithium-ion batteries (LIBs), they have advantages like high working voltage, excellent safety, and environmental friendliness.

A research team led by Prof. TANG Yongbing and Dr. ZHOU Xiaolong at the Shenzhen Institutes of Advanced Technology (SIAT) of the Chinese Academy of Sciences along with other collaborators jointly published an invited review article entitled "Beyond Conventional Batteries: Strategies towards Low-Cost Dual-Ion Batteries with High Performance" on Angew. Chem. Int. Ed.

DIBs have attracted worldwide attention for their high working voltage, low cost, ease of recycling, and low environmental impact, etc. However, due to the compaction density of graphite and limitation of theoretical capacity, the traditional double carbon structure of DIBs has a low energy density.

In 2016, Prof. TANG's group designed a novel aluminum-graphite DIB that realized the idea of integrating the electrodes. It used aluminum foil, which is cheap and environmentally friendly, as the cathode active material and current collector at the same time, and graphite as the anode material to build a new aluminum-graphite DIB system with high efficiency and low cost.

The anion and cathode are like the Cowherd and the Weaver Girl, two lovers in a Chinese fairy tale, who can only meet once a year on a magpie bridge in the sky: The two lovers are separated by the vast Milky Way Galaxy (electrolytes), but with the help of the magpie bridge (ion channel), they meet each other (discharge), and then return to their own places (charge). This cycle continuously repeats.

The main differences between DIBs and LIBs can be summarized as: The anion intercalates into the cathode during charge, which leads to both the different electrochemical energy storage mechanism and high working voltage. Since the anions come from electrolytes, the electrolytes are also considered active materials in DIBs; therefore, in the charge-discharge process, anions and cations are separated and reunited in the electrolyte.

The team also extended the new idea of integrated design to the abundant alkali (alkaline earth) metal-ion battery system. They successfully developed an environmentally friendly and low-cost sodium-based DIB - the potassium-ion based DIB - and the room temperature high-working-voltage calcium-ion battery, thus laying a very solid foundation for the industrial application of such integrated technology.

Chinese Academy of Sciences Headquarters

Related Environmentally Friendly Articles:

Green chemistry of fullerene: Scientists invented an environmentally friendly way to realize organic
Scientists from the Skoltech Center for Energy Science and Technology (CEST) and the Institute for Problems of Chemical Physics of Russian Academy of Sciences have developed a novel approach for preparing thin semiconductor fullerene films.
Environmentally friendly shipping helps to reduce freight costs
The shipping sector has potential to gain profit by reducing carbon dioxide emissions.
The majority consider themselves more environmentally friendly than others
Research from the University of Gothenburg shows that we tend to overestimate our personal environmental engagement.
Scientists have developed environmentally friendly way to build up road foundations
Scientists of Far Eastern Federal University (FEFU) and the Federal University of Technology -- Paraná/Brazil together with colleagues from Kazakhstan have proposed to build road foundations from a mixture of loam, metal slag and lime waste instead of traditional layers of natural sand and gravel.
A new concept could make more environmentally friendly batteries possible
A new concept for an aluminium battery has twice the energy density as previous versions, is made of abundant materials, and could lead to reduced production costs and environmental impact.
How NASA is becoming more business friendly
A new case study demonstrates the steps being taken by the US National Aeronautics and Space Agency (NASA) to make it easier for small businesses and entrepreneurs to understand its needs and do business with it.
Scientists propose environmentally friendly control practices for harmful tomato disease
Tomato yellow leaf curl disease (TYLCD) is the most destructive disease of tomato, causing severe damage to crops worldwide and resulting in high economic losses.
Environmentally friendly control of common disease infecting fish and amphibians
Aquatic organisms in marine systems and freshwaters are threatened by fungal and fungal-like diseases globally.
Botox cousin can reduce malaria in an environmentally friendly way
Researchers at the universities in Stockholm and Lund, in collaboration with researchers from the University of California, have found a new toxin that selectively targets mosquitos.
Researchers develop viable, environmentally-friendly alternative to Styrofoam
Washington State University researchers have developed an environmentally-friendly, plant-based material that for the first time works better than Styrofoam for insulation.
More Environmentally Friendly News and Environmentally Friendly 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

Clint Smith
The killing of George Floyd by a police officer has sparked massive protests nationwide. This hour, writer and scholar Clint Smith reflects on this moment, through conversation, letters, and poetry.
Now Playing: Science for the People

#562 Superbug to Bedside
By now we're all good and scared about antibiotic resistance, one of the many things coming to get us all. But there's good news, sort of. News antibiotics are coming out! How do they get tested? What does that kind of a trial look like and how does it happen? Host Bethany Brookeshire talks with Matt McCarthy, author of "Superbugs: The Race to Stop an Epidemic", about the ins and outs of testing a new antibiotic in the hospital.
Now Playing: Radiolab

Dispatch 6: Strange Times
Covid has disrupted the most basic routines of our days and nights. But in the middle of a conversation about how to fight the virus, we find a place impervious to the stalled plans and frenetic demands of the outside world. It's a very different kind of front line, where urgent work means moving slow, and time is marked out in tiny pre-planned steps. Then, on a walk through the woods, we consider how the tempo of our lives affects our minds and discover how the beats of biology shape our bodies. This episode was produced with help from Molly Webster and Tracie Hunte. Support Radiolab today at