On the third floor of Dalhousie鈥檚 Dunn Building, you鈥檒l find the labs of the Jeff Dahn Research Group, spanning several rooms of blinking lights and buzzing machines. There, you鈥檒l also find Dr. Dahn鈥檚 office: a tiny space mostly used to hold boxes upon boxes of batteries for testing. (It鈥檚 fair to assume Dr. Dahn spends most of his time in the labs.)
On the office鈥檚 wall hang two Calvin and Hobbes cartoons 鈥斅燼 personal favourite of the world-renowned Dal battery researcher. One in particular stands out: originally published in July 1987, the comic strip finds Calvin outraged over garbage and litter, and how humans treat the planet more generally.
鈥淭hat鈥檚 what it鈥檚 all about, right here,鈥� says Dr. Dahn, who says his continuing quest to build better, longer-lasting batteries has always been informed by an environmental consciousness.
鈥淲e can鈥檛 just keep burning fossil fuels; we鈥檙e going to heat the planet into death. And if you like the sea shore, and you want to continue to have land that you currently see not be submerged, you have to do something about it.鈥�
For more than 35 years, Dr. Dahn has been at the forefront of research and innovation in battery technology. Through a mixture of fundamental and applied research, the work of his team can be found in some lithium-ion rechargeable batteries used in power tools, electric vehicles and other devices around the world today. Now, collaborating with Tesla as an industrial research chair, his lab is helping improve lithium-ion cells for electric vehicles and energy storage.
And on Tuesday (February 7), that body of work was recognized with the highest scientific honour in Canada.
Celebrating a research career
Dr. Dahn is the 2017 recipient of the . The esteemed prize is akin to a lifetime achievement award, celebrating sustained excellence and overall influence of research work conducted in Canada. It鈥檚 an incredible honour for Dr. Dahn, a researcher who鈥檚 made 黑料吃瓜网his home base for more than two decades.
It鈥檚 also a milestone award for the university itself. With Dr. Dahn鈥檚 win, three of the past four Herzberg recipients have been 黑料吃瓜网faculty 鈥斅燼 very rare feat in the 20-plus year history of the award. Dal microbiologist Ford Doolittle received the award in 2014, while theoretical chemist Axel Becke was awarded the 2015 medal.
鈥淒al鈥檚 Herzberg Canada Gold Medal recipients exemplify research excellence in Canada,鈥� says Martha Crago, Dalhousie鈥檚 vice-president research. 鈥淚n Dr. Dahn鈥檚 case, his leading work in materials science and lithium-ion batteries has attracted the attention of many all over the world and launched him into a class of his own.鈥�
Dr. Dahn says he was 鈥渟tunned鈥� when he heard he would be receiving the Herzberg, which comes with a $1-million research prize.
鈥淚t was pretty flattering, and the award will support our research going forward,鈥� he says. 鈥淲e鈥檒l use it wisely.鈥�
He adds the Herzberg Gold Medal award to an impressive set of awards and honours throughout his career. They include the inaugural Governor General鈥檚 Innovation Award (2016), the Yeager award from the International Battery Materials Association (2016), induction into Nova Scotia's Science Hall of Fame (2016), fellowship in the Royal Society of Canada (2001). He even has a second Herzberg award 鈥斅燼 different medal, also named after Nobel-winning German-Canadian physicist Gerhard Herzberg, from the Canadian Association of Physicists.
鈥淲riting the book鈥� on Li-ion batteries
Dr. Dahn first came to Nova Scotia at age 13, emigrating with his family from Connecticut. He studied Physics at 黑料吃瓜网as an undergrad before completing his PhD at the University of British Columbia. He worked at the National Research Council of Canada, Moli Energy Limited and Simon Fraser University before returning to 黑料吃瓜网in 1996 as the NSERC/3M Canada Industrial Research Chair in Materials for Advanced Batteries. (Since 2003, he鈥檚 also been the Canada Research Chair in Battery and Fuel Cell Materials.)
From the beginning, his research focused on the science of batteries and energy storage. In the 1980s, researchers were beginning to explore using lithium compounds as the core electrode materials in lithium batteries. Today, lithium-ion batteries 鈥� which don鈥檛 actually contain lithium metal at all 鈥斅爌ower rechargeable devices of all sorts, from cell phones and laptops to tools and electric vehicles.
鈥淲e wrote some of the very important papers on lithium-ion batteries in the very beginning,鈥� says Dr. Dahn of his early career, highlighting his work at Simon Fraser characterizing which carbon compounds could effectively serve as the negative electrode. 鈥淲e sort of wrote the book on what type of carbon you should use in a lithium-ion battery to make the best one.鈥�
It was at Dalhousie, though, where Dr. Dahn and his team would make perhaps their most significant contribution to lithium-ion batteries. Post-doc Zhonghua Lu, graduate student Dean MacNeil and Dr. Dahn developed certain grades of lithium nickel-manganese-cobalt (NMC) oxide compounds, ones that when used as the positive electrode, increase the safety and stability of the batteries at larger sizes.
Seventeen years later, these grades of NMCs are widely used in power tool and electric car batteries around the world 鈥斅燼nd represent several of the 65 or so inventions that his team has patented. And 3M (Dahn's industrial partner at the time) has licensed the use of these NMC grades for commercial use to many companies around the world. 聽
Empowering students
Dr. Dahn鈥檚 team has also made significant contributions to research on lithium-ion battery lifetimes: understanding what causes lithium-ion cells to die, and how to get them to last even longer.
鈥淎 cell phone battery only needs to last three or four years and then聽 the phone is changed for a new model,鈥� says Dr. Dahn. 鈥淧ower tools are the same thing; you can just get a replacement pack. But once the batteries start to get big聽鈥� like in electric vehicles 鈥斅爐hey cost a lot, so they have to last a long time.鈥�
Graduate student Chris Burns and research associate David Stevens, who were involved in this research, created the Dartmouth-based spin-out Novonix. The company produces ultra high-precision charger devices 鈥斅爐he sort that allow their customers to predict lifespans of Li-ion cells on the scale of not just years, but decades.
鈥淚t鈥檚 amazing to have such a world-renowned researcher within the field of batteries here at Dalhousie,鈥� says Chris Burns, Novonix co-founder, who completed both his master鈥檚 and doctoral degrees with Dr. Dahn鈥檚 group. 鈥淗e provides a foundation for students to learn and work at the cutting edge of an exciting field with access to top tier industrial collaboration around the world, which is an amazing opportunity within an academic group.鈥�
Indeed, Dr. Dahn 鈥斅爓ho, even with his two research chairs, has taught first-year Physics classes at Dal for more than 20 years 鈥� says his proudest achievements are in the careers of the graduates who鈥檝e come out of his lab.
鈥淚鈥檝e trained a lot of graduate students 鈥斅爌robably over 50 PhDs, 20 to 25 postdocs. And virtually all of them have gone on to careers in the battery materials or lithium-ion battery space鈥� Some are millionaires because they鈥檝e formed their own companies and done really well. A lot of them are vice-presidents research or chief technical officers and so on.
鈥淚t makes me really proud, what these folks have accomplished after they鈥檝e left the group.鈥�
A new era with Tesla
After helping lay the basic scientific foundation for lithium-ion batteries in the 1980s, the bulk of Dr. Dahn鈥檚 career has been in close collaboration with dedicated industry partners. It鈥檚 a path that鈥檚 allowed him to focus his research on applied solutions to the problems faced by battery manufacturers.
鈥淲orking together with industry ensures that, if you want to have a long-term relationship [with them], that we鈥檙e doing something useful,鈥� he explains. 鈥淎nd why not do something useful, when you have a chance to do anything you want?鈥�
His latest collaboration, launched in 2016, is with Tesla as the NSERC/Tesla Canada Industrial Research Chair. The company is one of the largest manufacturers of the electric vehicles in the world and its new Gigafactory, based in Nevada, is bringing roughly one-third of global lithium-ion battery production to North America. But when it came time for the company to sign its first ever university research partnership, it went north 鈥斅燼nd east 鈥斅爐o Jeff Dahn鈥檚 door.
Tesla 鈥斅爓hich aims to not only improve electric vehicles, but 鈥渁ccelerate the world鈥檚 transition to sustainable energy鈥� more broadly 鈥斅�signed-off on a five-year exclusive collaboration with Dr. Dahn鈥檚 lab, focused on increasing the lifetime, decreasing the cost and improving the energy density of lithium-ion batteries.
鈥淭he goals are really simple, but the problems are hard,鈥� explains Dr. Dahn. 鈥淭he area is of such importance, and the problems are so interesting and challenging that it鈥檚 fun.鈥�
Some of the lab鈥檚 work could be incorporated into the company鈥檚 products shortly 鈥斅爌erhaps within a year, Dr. Dahn speculates. As he talks about the future of renewable energy, and the vision of mass-scale energy storage, there鈥檚 an incredible enthusiasm in his voice. He sees a better future for how we power our planet 鈥斅燼nd it鈥檚 a future he and his students are helping build.
It鈥檚 really cool,鈥� says Dr. Dahn. 鈥淢y students, I hope, are getting a sense of just how cool it is.鈥�
Additional file photos from Nick Pearce and Danny Abriel
Kudos from colleagues
We asked some of Dr. Dahn's former students and Dal colleagues to share their appreciation for his work and his contributions to both his field and to Dalhousie.
