Weiliang Yao

Dry electrode architecture design to push energy density limits at the cell level

Minghao Zhang, Boyan K. Stoychev, Xingyu Zhang, Weiliang Yao et autres

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Design and Performance of the BYD LFP/Graphite 4680 Cylindrical Cell

Alex Ruili Liu, Weiliang Yao, David E. Gonsoulin, Amariah Condon et autres

The increasing demand for large-format lithium-ion batteries in electric vehicles has accelerated the development of cell formats that offer higher energy density and improved pack-level efficiency. Among these, the 4680 cylindrical cell format, pioneered by Tesla, has gained widespread adoption due to …

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Dry Electrode Architecture Design for Pushing Energy Density Limits at Cell Level

Minghao Zhang, Boyan K. Stoychev, Xingyu Zhang, Weiliang Yao et autres

Pushing the energy density limits of lithium batteries requires electrode architectures that simultaneously support high areal capacity, maximize active material content, and enable stable cycling at high voltages. However, conventional slurry-based designs fail to meet these combined demands due to sub-optimal electron …

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Anomalous Electrical Transport in the Kagome Magnet YbFe 6 Ge 6

Weiliang Yao, Supeng Liu, Hodaka Kikuchi, Hajime Ishikawa et autres

Two-dimensional (2D) kagome metals offer a unique platform for exploring electron correlation phenomena derived from quantum many-body effects. Here, we report a combined study of electrical magnetotransport and neutron scattering on YbFe_{6}Ge_{6}, where the Fe moments in the 2D kagome layers exhibit …

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Anomalous Electrical Transport in the Kagome Magnet YbFe$_6$Ge$_6$

Weiliang Yao, Supeng Liu, Hodaka Kikuchi, Hajime Ishikawa et autres

Two-dimensional (2D) kagome metals offer a unique platform for exploring electron correlation phenomena derived from quantum many-body effects. Here, we report a combined study of electrical magnetotransport and neutron scattering on YbFe$_6$Ge$_6$, where the Fe moments in the 2D kagome layers exhibit …

Anomalous proximitized transport in metal/quantum magnet heterostructure Bi 2 Ir 2 O 7 / Yb 2 Ti 2 O 7

Chengkun Xing, Shu Zhang, Weiliang Yao, Dapeng Cui et autres

Quantum mechanics permits entanglement and state-tunneling of spins, enabling magnetic materials to rapidly alter configurations without energy expenditure. However, strong quantum spin fluctuations typically arise in nonconductive frustrated magnets, limiting their technological application. The authors demonstrate that an epitaxial conductive film grown …

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Understanding and Controlling Structural Defects and Disordering in LiNi0.5Mn1.5O4 Cathodes for Direct Recycling

Hongpeng Gao, Bing Han, Duc Tran, Luqi Zhang et autres

Despite significant progress in recycling spent lithium-ion batteries (LIBs), nondestructive, direct recycling methods still face untenable discrepancies in multiple cathode chemistries, which primarily originate from a variety of structure stabilities during the recycling process. Through systematic investigation of the microstructure evolution during …

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Absence of Acoustic Phonon Anomaly in a Kagome Metal with Short-ranged Structural Modulation

Weiliang Yao, Supeng Liu, Zifan Xu, Daisuke Ishikawa et autres

Kagome lattice $A$V$_3$Sb$_5$ ($A$ = K, Rb, and Cs) superconductors without magnetism from vanadium $d$-electrons are intriguing because they have a novel charge density wave (CDW) order around 90 K and display superconductivity at $\sim$3 K that competes with the CDW order. …

Insights into lithium inventory quantification of LiNi0.5Mn1.5O4–graphite full cells

Wurigumula Bao, Weiliang Yao, Yixuan Li, Baharak Sayahpour et autres

High voltage spinel cathode LiNi0.5Mn1.5O4 (LNMO) offers higher energy density and competitive cost compared to traditional cathodes in lithium-ion batteries, making it a promising option for high-performance battery applications. However, the fast capacity decay in full cells hinders further commercialization. The Li …

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Insights into lithium inventory quantification of LiNi0.5Mn1.5O4–graphite full cells

Wurigumula Bao, Weiliang Yao, Yixuan Li, Baharak Sayahpour et autres

High voltage spinel cathode LiNi0.5Mn1.5O4 (LNMO) offers higher energy density and competitive cost compared to traditional cathodes in lithium-ion batteries, making it a promising option for high-performance battery applications. However, the fast capacity decay in full cells hinders further commercialization. The Li …

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Stabilizing high temperature operation and calendar life of LiNi0.5Mn1.5O4

Weiliang Yao, Yixuan Li, Marco Olguin, Shuang Bai et autres

Severe capacity degradation at high operating voltages and poor interphase stability at elevated temperature have thus far precluded the practical application of LiNi0.5Mn1.5O4 (LNMO) as a cathode material for lithium-ion batteries. Addressing these challenges through a combination of experimental and theoretical methods …

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Persistent spin dynamics in magnetically ordered honeycomb-lattice cobalt oxides

Ping Miao, Xianghong Jin, Weiliang Yao, Yue Chen et autres

In the quest to find quantum spin liquids, layered cobalt oxides ${\mathrm{Na}}_{2}{\mathrm{Co}}_{2}{\mathrm{TeO}}_{6}$ and ${\mathrm{Na}}_{3}{\mathrm{Co}}_{2}{\mathrm{SbO}}_{6}$ have been proposed as promising candidates for approximating the Kitaev honeycomb-lattice model. Yet, their suitability has been thrown into question due to observed long-range magnetic order at low …

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