Posts tagged energy
CU scientists: New battery extends range and safety of electric-powered vehicles
Sep 22nd
A cutting-edge battery technology developed at the University of Colorado Boulder that could allow tomorrow’s electric vehicles to travel twice as far on a charge is now closer to becoming a commercial reality.
CU’s Technology Transfer Office has completed an agreement with Solid Power LLC—a CU-Boulder spinoff company founded by Se-Hee Lee and Conrad Stoldt, both associate professors of mechanical engineering—for the development and commercialization of an innovative solid-state rechargeable battery. Solid Power also was recently awarded a $3.4 million grant from the U.S. Department of Energy’s Advanced Research Projects Agency-Energy for the purpose of creating a battery that can improve electric vehicle driving range.
The rechargeable batteries that are standard in today’s electric vehicles—as well as in a host of consumer electronics, such as mobile phones and laptops—are lithium-ion batteries, which generate electricity when lithium ions move back and forth between electrodes in a liquid electrolyte solution.
Engineers and chemists have long known that using lithium metal as the anode in a rechargeable battery—as opposed to the conventional carbon materials that are used as the anode in conventional lithium-ion batteries—can dramatically increase its energy density. But using lithium metal, a highly reactive solid, in conjunction with a liquid electrolyte is extremely hazardous because it increases the chance of a thermal runaway reaction that can result in a fire or an explosion.
Today’s lithium-ion batteries require a bulky amount of devices to protect and cool the batteries. A fire onboard a Boeing Dreamliner in January that temporarily grounded the new class of plane was linked to its onboard lithium-ion battery.
Lee and Stoldt solved the safety concerns around using lithium metal by eliminating the liquid electrolyte. Instead, the pair built an entirely solid-state battery that uses a ceramic electrolyte to separate the lithium metal anode from the cathode. Because the solid-state battery is far safer, it requires less protective packaging, which in turn could reduce the weight of the battery system in electric vehicles and help extend their range.
Research into the development of solid-state batteries has gone on for a couple of decades, but it has been difficult to create a solid electrolyte that allowed the ions to pass through it as easily as a liquid electrolyte.
“The problem has always been that solid electrolytes had very poor performance making their use in rechargeable batteries impractical,” Stoldt said. “However, the last decade has seen a resurgence in the development of new solid electrolytes with ionic conductivities that rival their liquid counterparts.”
The critical innovation added by Lee and Stoldt that allows their solid-state lithium battery to out-perform standard lithium-ion batteries is the construction of the cathode, the part of the battery that attracts the positively charged lithium ions once they’re discharged from the lithium metal. Instead of using a solid mass of material, Lee and Stoldt created a “composite cathode,” essentially small particles of cathode material held together with solid electrolyte and infused with an additive that increases its electrical conductivity. This configuration allows ions and electrons to move more easily within the cathode.
“The real innovation is an all-solid composite cathode that is based upon an iron-sulfur chemistry that we developed at CU,” Stoldt said. “This new, low-cost chemistry has a capacity that’s nearly 10 times greater than state-of-the-art cathodes.”
Last year, Lee and Stoldt partnered with Douglas Campbell, a small-business and early-stage product development veteran, to spin out Solid Power.
“We’re very excited about the opportunity to achieve commercial success for the all solid-state rechargeable battery,” said Campbell, Solid Power’s president. “We’re actively engaging industrial commercial partners to assist in commercialization and expect to have prototype products ready for in-field testing within 18 to 24 months.” Important to the early success of the company has been its incubation within CU-Boulder’s College of Engineering and Applied Science’s applied energy storage research center, a part of the college’s energy systems and environmental sustainability initiative.
Solid Power is a member of Rocky Mountain Innosphere, a nonprofit technology incubator headquartered in Fort Collins, Colo., with a mission to accelerate the development and success of high-impact scientific and technology startup companies.
“We’re very excited to be working with Solid Power’s team to get them to the next level,” said Mike Freeman, Innosphere’s CEO. “This is a big deal to Colorado’s clean-tech space. Solid Power’s batteries will have a huge impact in the EV market, and they have a potential $20 billion market for their technology.”
Learn more about Solid Power at http://www.solidpowerbattery.com.
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Baylor a cake-walk for CU volleyball: three and out
Sep 15th
WACO, Texas —The University of Colorado volleyball team (8-1) dominated the Baylor Bears (4-7), sweeping them 25-21, 25-23, 25-11 to win the Baylor Invitational on Saturday night at the Ferrell Center.
Nicole Edelman was named the tournament’s MVP, while Kerra Schroeder was named the defensive MVP. Alexis Austin and Cierra Simpson were also honored as members of the all-tournament team. The Buffs went 3-0 at the BU Invite with wins against Northwestern State and Appalachian State on Friday.
Saturday’s win is the eighth consecutive for the Buffs and ties the fifth longest streak in CU volleyball history. It is the longest streak since 1997 when the Buffs had a 10-match win streak, which tied the longest streak.
The win was also head coach Liz Kritza’s first win against Baylor. The victory snapped an eight-match losing streak for CU against the Bears which started in 2007 while CU was still a member of the Big-12 Conference.
“Tonight’s performance caps off a very tough weekend for this team, and I am pleased not only with the three wins and the improvement we made as a program, but most importantly the character and resiliency this group showed,” Kritza said. “With all the possible distractions while our home state is experiencing a catastrophic event, this group of players, coaches, and staff pulled together and put forth a strong performance and really showed great character.”
Austin proved to be a key player in the match as she provided key points at the end of the first and second sets. In total, Austin hammered a team high 12 kills and hit .400 with only two errors on 25 attacks. She also added three digs and three blocks.
“Alexis did a fantastic job tonight in finishing at the end of sets tonight,” Kritza said. “The offense was firing properly and she was able to make a significant impact on the overall outcome of the match.”
Taylor Simpson also had a nice night for the Buffs with 11 kills. She picked up her third double-double of the season with 13 digs. Schroeder hit a match-best .750 with seven kills on eight errorless attacks and added six digs and two block assists.
“Schroeder was a steady presence and came up with key plays when we needed her to,” said Kritza. “Her experience on the court is crucial as this young group keeps progressing towards Pac-12 play.”
Edelman led the team with 14 digs and handed out 32 assists. She also directed the team to a .236 hitting efficiency with 42 kills. The Buffs held BU to just 25 kills, while hitting .035. The Bears had 21 attack errors on 113 attacks.
“Edelman did a very good job this weekend of keeping our offense balanced and tonight’s performance showed her experience and ability to run an offense at a high level,” Kritza said.
Kritza was also very impressed with Elysse Richardson’s performance. She picked up five digs and added two assists and an ace in the sweep.
“A key performance that doesn’t always appear on the stat sheet is the performance of Elysse Richardson,” Kritza said. “She has the ability to go into a match and change the energy of the team and she did that again for us at the pivotal point. That role is essential to a team’s success and it takes a very special person to be able to go in under the most pressured situations and perform, and she answered that call.”
The first set of the match was very close with eight ties and three lead changes. CU led 20-18 when the Bears tied it up one last time at 20-20. After a CU timeout, the Buffs came out with three straight points to go ahead 23-20. BU answered back with a kill to get within two points, but Austin finished the set for the Buffs with two straight kills (25-21).
BU had a 15-10 lead in the second set when CU used its first timeout. Out of the break, the Buffs recorded three straight points before BU sided-out with a kill (16-14). After the kill, CU put together a 5-0 run to take an 18-16 advantage. The two teams continued to battle and the match was tied yet again at 20-20. The Bears took three straight points to force CU to use a timeout, which worked well since the Buffs finished the set with five straight points out of the break, including two kills and a block from Austin (25-20).
The Buffs dominated the third set and used a 9-0 run to go up 12-5. BU was able to take three of the next four points to bring the score to 13-8, but once again the Buffs put together a run, this time it was six straight points to go up 19-8. The Bears were out of timeouts and had no way of slowing the Buffs down as CU finished easily 25-11.
The Buffs will be off until September 24 when they will travel to Salt Lake City to open the Pac-12 Conference schedule against Utah. That match is scheduled 7 p.m. and will be televised live on the Pac-12 Network.
COLORADO BUFFALOES
Linda Sprouse
Assistant Sports Information Director
Volleyball/Cross Country/Track & Field
University of Colorado
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Boulder: Let the sun shine on city’s energy future
Sep 10th
The City of Boulder announced today that it will create a working group of solar industry specialists and customers – both current and future – to explore motivators and barriers to implementing more solar throughout the community. The focus of the group’s work will be on defining the next-generation of incentives as well as providing guidance about how to handle solar contracts between now and the time when the city decides whether it will create a local electric utility.
“Supporting and increasing renewable sources of energy is a core value, and we see this discussion as an important next step in our effort to create the electric utility of the future,” said Heather Bailey, executive director of Energy Strategy and Electric Utility Development.
Bailey said the city has a unique opportunity to benefit from local experts to design programs that will encourage more local energy production. Expertise from the university and federal labs, as well as the numerous companies and entrepreneurs developing leading-edge energy technologies, has already helped Boulder achieve one of the highest levels of solar per-capita in the US, with close to 14 megawatts installed in the city.
The City of Boulder has also played a significant role in supporting local energy generation, particularly solar. This has included streamlining the permitting process to offering a local solar rebate and grant program. The concept of Solar Gardens was originally conceived in Boulder, and city staff members were on the drafting team of legislation that allowed this. The solar gardens law was signed by then-Governor Bill Ritter overlooking the Flatirons from a parking lot rooftop along the Pearl Street Mall.
“We don’t want to simply continue this tradition; we want to make it even stronger by working with stakeholders to identify ways to encourage even more locally generated clean energy sources. This is fundamental to achieving our community’s goals, whether we create our own electric utility or strike a new agreement with our current provider, Xcel Energy,” Bailey said.
One of the questions the city would like to resolve is how to encourage continued participation in solar installations during the ongoing deliberation about – and possible transition to – a local electric utility. Xcel Energy recently sent the city a letter requesting that the city agree to take over contracts it has with customers if Boulder forms an electric retail utility.
The City of Boulder is committed to protecting those who have made investments in solar energy in our community from any adverse impact related to the creation of a municipal utility. The city is also interested in working with Xcel on this important issue, not only to protect those who have already made investments, but to encourage growth in this area of renewable energy.
Boulder has no way, however, of evaluating the estimates that Xcel has made about these costs.
“Before we can agree to any arrangement, we need more information from Xcel Energy,” City Attorney Tom Carr said. “The company so far has declined most of the requests for data the city has made. Without detailed information about these contracts, we have no way of verifying Xcel’s assertions and perhaps more importantly, of making sure we are doing the right thing to protect our forward-thinking customers and other ratepayers.”
The city’s Energy Future team anticipates holding the first meeting of the solar working group shortly after the Nov. 5 election. Members of the community and industry who are interested in participating are encouraged to contact Heather Bailey at 33-441-1923 or baileyh@bouldercolorado.gov.
More information about the Energy Future project is available at www.BoulderEnergyFuture.com.
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