"In terms of cathode materials for lithium-sulfur batteries, we use a
double 'Fisher esterification' module assembly method to assemble dispersed
conductive carbon into an ellipsoid-shaped micron superstructure, which
significantly increases the sulfur loading per unit area of the cathode. , the
battery energy density reaches 545Wh/kg." Wu Feng, academician of the Chinese
Academy of Engineering and professor of Beijing Institute of Technology,
recently introduced the latest progress of his research team in the research of
new materials for lithium batteries.
In addition to lithium-sulfur batteries, Academician Wu Feng also
introduced that Peking University and other units have also made breakthroughs
in the research of high specific volume lithium-rich manganese-based materials.
“Our team has also conducted a series of research on bionic membrane design,
improving material stability through interface protection, building selective
lithium ion channels, and improving material rate performance,” he said.
In terms of power battery safety, Academician Wu Feng's research team
started with materials, including developing temperature-sensitive electrodes,
ceramic high-strength separators, safety electrolytes, etc., which significantly
improved the intrinsic safety of batteries. A new generation of gel solid
electrolyte based on nano-TiO2 and ionic liquid has also been developed, which
has high room temperature conductivity and significant safety (non-flammable at
1300°C/60s).
Academician Wu Feng said that electrolyte is one of the main factors
affecting the safety of lithium ions. As it develops towards solid state, he
believes that it has not yet reached full solid state. The research team he led
has developed a new ion condensation device with a new bionic ant nest
structure. The gel electrolyte forms a protective layer on the surface of
lithium metal, which can effectively inhibit the growth of lithium dendrites. He
said that research on bionic battery materials is conducive to the greening of
the battery itself.
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Academician Wu Feng has long been engaged in the research and development
of new secondary batteries and related energy materials. He was the first to
propose the academic idea of using light elements, multi-electrons, and
multi-ion reaction systems to achieve a leap-forward increase in battery energy
density, and developed a new high-specific energy secondary battery. The system
and key materials have attracted the attention and high praise of international
peers.
Academician Wu Feng independently developed a series of key new materials
for lithium-ion batteries, new battery preparation processes and battery safety
technologies, providing technical support for the upgrading of China's lithium
battery industry and entering the international high-end product market; he
proposed the collaboration of a series of key materials To improve the intrinsic
safety of batteries, he invented safety electrodes, composite ceramic polymer
separators, and electrolyte systems with flame retardancy and electrochemical
compatibility; he was the first to propose the concept of battery system safety
threshold boundaries, and developed identification and Control Technology.
It is worth mentioning that Academician Wu Feng invented lithium-containing
hydrogen storage alloys and their preparation methods, breaking foreign patent
monopoly on hydrogen storage alloys, presided over the creation of China's first
nickel-metal hydride battery pilot base, and achieved industrialization
Integrating key technologies, we designed and built China's first automated
nickel-metal hydride battery demonstration production line; we developed a
series of nickel-metal hydride power battery packs and successfully applied them
to a variety of hybrid vehicles.
Focusing on the country's major needs, Academician Wu Feng explored the
technological integration of different secondary battery systems and made
innovative breakthroughs in battery reaction theory, key materials and
engineering technology, making important contributions to the industrial
development of secondary batteries in China. . Some members of the 973 and 863
basic and applied research teams led by Academician Wu Feng have become leaders
in the field of secondary batteries and new energy materials in my country.
Wu Feng was elected as an academician of the International Eurasian Academy
of Sciences in 2014; in 2016, he received the first Lifetime Achievement Award
issued by the International Automotive Lithium Battery Association (IALB); in
2017, he was elected as an academician of the Asia-Pacific Academy of Materials
Sciences and an academician of the Chinese Academy of Engineering. He served as
a member and deputy leader of the National High Technology (863) Functional
Materials Expert Group, a member and standing committee member of the National
High Technology (863) New Materials Expert Committee, the leader of the National
Ministry of Science and Technology’s Nickel-Hydrogen Battery Expert Group and
the National High Technology (863) ) Expert of the overall group of major
electric vehicle projects.
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Wu Feng is currently the vice chairman of the China Battery Industry
Association, the vice chairman of the China Chemical and Physical Power Source
Industry Association, the chairman of the expert committee of the power battery
application branch, and the member of the new energy vehicle access expert
committee of the Ministry of Industry and Information Technology; he has served
as the Sino-US electric vehicle expert for 12 consecutive times. Chairman of the
Battery Technology Seminar, and 6 times chairman of the International Forum on
Power Lithium Battery Technology and Industry Development.
Facing the development status of the domestic power battery industry,
Academician Wu Feng believes that the current situation of China's power
batteries is overall overcapacity and insufficient high-quality production
capacity, and there is an urgent need for further innovation and development in
order to achieve disruptive technological breakthroughs. However, you must know
that a truly disruptive innovation that starts from basic research does not
happen overnight and cannot be rushed. Sometimes it takes five, ten, or fifteen
years, or even longer.
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