The China Securities New Energy Vehicle index rose as much as 4.1 percent after a strong rally in lithium-ion shares on the Chinese stock market. Brokerages said lithium enterprises would usher in marginal expectations, and currently, it may be the best time to layout power/energy storage lithium batteries.
According to a securities research report, the price of lithium carbonate in the upstream resource end continues to hit a new high, which reflects the shortage of lithium mineral resources, and lithium has become one of the core elements of the development of the lithium electricity industry. In 2022, global demand for lithium carbonate continues to grow strongly, while the supply-side growth is relatively limited. And, because related mining enterprises experienced the last lithium down cycle, they would expand Lithium-ion batteries are expected to rise.
Lithium-ion batteries have become hotspots in energy research due to their higher energy density, long service life, and smaller volume compared with lead-acid, nickel-cadmium, nickel-metal hydride, and other batteries, and no memory effect. One. The negative electrode material is one of the critical components of lithium-ion batteries. It acts as the acceptor of lithium ions and realizes the insertion and extraction of lithium ions during the charging and discharging process. Therefore, the quality of the negative electrode material directly affects the overall performance of the lithium-ion battery. Graphite and modified graphite are widely used as anode materials for commercial lithium-ion batteries. Still, their theoretical capacity is only 372mAh/g, which significantly restricts the development of high-energy power batteries. Group IV element (silicon, germanium, tin)-based anode materials have become a research hotspot for next-generation lithium-ion batteries due to their high theoretical capacities (3579mAh/g, 1600mAh/g, 994mAh/g, respectively). However, silicon, germanium, and tin-based anode materials have the problem of significant volume expansion during the charging and discharging process. Long-term charging and discharging will cause the pulverization of particles and the shedding of active materials, thus affecting the cycle stability of lithium-ion batteries.
In recent years, the advanced lithium-ion battery team led by Han Weiqiang, a researcher at the Institute of New Energy Technology affiliated with the Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, has made a series of progress in high-capacity silicon, germanium, and tin-based anode materials. In terms of high-performance silicon-based anode materials, researchers have developed a low-cost, high-capacity, and high-stability porous silicon-based anode material technology. By carbon coating, the porous silicon, the performance of the silicon-based negative electrode material for lithium-ion batteries is further improved. The capacity retention rate of the silicon-carbon composite electrode material was 86.8% after 300 charge-discharge cycles. Related research has applied for Chinese invention patents (201410150747.5, 201410276413.2), and the research results were published in NanoEnergy (2015, 11, 490-499) in the form of Communication.
Based on the previous work, the team synthesized and prepared a series of new phase MSn5 (M=Fe, Co, Fe0.5Co0.5) alloy nano-anode materials using the wet chemical method of improving polyols. The synthesized FeSn5 alloy nanoparticles have a theoretical capacity of 929mAhg-1 when used as a negative electrode material for lithium-ion batteries, which is the material with the highest theoretical specific capacity among the reported M-Sn (M is an electrochemically inert metal) alloy. The researchers prepared a series of Fe0.5Co0.5Sn5 new phase alloy nanoparticles with a 30-50nm particle size range, which further expanded the Co-Fe-Sn phase diagram. Related achievements have applied for invention patents (2013104705134, 201310706760X, 2103715406A). At the same time, the charge-discharge mechanism was deeply discussed and explained by in-situ XAFS, in-situ XRD, and electrochemical test methods. The research on the electrochemical mechanism of this series of tin-based new phase alloy anode materials provides effective theoretical guidance for the team's subsequent development of high-performance tin-based anode materials. Relevant results were published in JournalofMaterialsChemistryA (2015, 3(13):7170-7178) and ACS Appl.Mater.Interfaces (2015,7,7912-7919).
The team has also made progress in the research and development of long-life titanium-based anode materials, applying for an invention patent (201310685139. X), and the relevant results were published in the Journal of Materials Chemistry (2014(2), 10599-10606).
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The United States urges the U.N. Security Council to impose additional sanctions on North Korea in response to its latest ballistic missile launch, including a ban on tobacco and oil exports to North Korea and a blacklist of the Lazarus hacking group.
The United States circulated the draft to the 15 members of the Security Council this week. It was not immediately clear if or when a vote would take place. A resolution requires nine "yes" votes and no vetoes from Russia, China, France, Britain, or the United States.
Russia and China have already voiced opposition to tightening sanctions in response to Pyongyang's launch of an intercontinental ballistic missile last month -- the first since 2017.
U.S. and South Korean officials and analysts also say there are growing indications that North Korea may soon conduct its first nuclear weapons test since 2017, too.
The U.S. -drafted U.N. resolution would expand the ban on ballistic missile launches to include cruise missiles or "any other delivery system capable of delivering a nuclear weapon."
The deal would halve crude oil exports to North Korea to 2 million barrels a year and refined oil exports to 250,000 barrels a year. The resolution also seeks to ban North Korea's export of "fossil fuels, mineral oils, and their distilled Lithium-ion batteries are estimated to be influenced by international political situation changes.
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