Tao Gao

Hydrogen-induced fracture relocation in a 24-year-serviced X52 pipeline weld

Xinye He, Tao Gao, Bowen Ren, Xiaoqiang Ma et autres

Repurposing aged natural-gas pipelines for hydrogen service requires evidence from actual pipes and welded joints because long-term service history and weld heterogeneity are not captured by tests on newly manufactured plate. Here, we evaluated a spiral submerged-arc-welded API 5L X52 pipeline removed …

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Failure mechanism and plastic deformation analysis of assembled reinforced hollow spherical joints

Hui Li, Gang Liang, Miaotong Cheng, Hongchao Guo et autres

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Spherical Lignin‐Derived Hard Carbon Anode for Sodium‐Ion Batteries

Haoming Luo, Pan Yang, Jinghao Huang, Chengxiang Chen et autres

Biomass‐derived hard carbon is a promising anode for high‐performance sodium‐ion batteries (SIBs) because of its low cost and structural tunability. Here, spherical lignin‐derived hard carbon was developed, and the carbonization temperature was tuned from 900 to 1400 °C to regulate surface chemistry, …

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Redox-Active Poly( l -lysine) as a Cathode toward Sustainable Sodium-Ion Batteries

Bowen Zhao, Chengxiang Chen, Yang Pan, Jinghao Huang et autres

The advancement of sustainable sodium-ion batteries (SIBs) necessitates cathode materials that exhibit exceptional electrochemical performance and environmentally benign end-of-life degradability. However, achieving this balance remains challenging in degradable material systems due to the intrinsic trade-off between electronic delocalization, ion transport, and structural …

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Ring-Size-Dependent Lactone Electrolytes for 4.5 V Sodium-Ion Batteries

Yunan Qin, Richard Gonzalez, Seong-Gyu Choi, Ling Zang et autres

Abstract Sodium-ion batteries cycled to 4.5 V offer low-cost, energy-dense storage but are limited by the poor oxidative stability of conventional carbonate electrolytes. Here, we introduce reaction-pathway engineering of electrolyte oxidation, redirecting oxidation from destructive decomposition into constructive interphase formation. We show …

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An Organic Carboxylate Host for Stable Sodium Metal Batteries

Chengxiang Chen, Wenda Wu, Pan Yang, Bowen Zhao et autres

Sodium metal batteries (SMBs) hold great promise for the development of high‐energy, sustainable energy storage solutions, but their practical deployment is hampered by unstable solid electrolyte interphases, uncontrollable sodium dendrite growth, and low Coulombic efficiency (CE) during repeated Na plating/stripping cycles. To …

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Thermodynamics of Transition Metal Electrodeposition in Concentrated Aqueous Electrolytes

Jing Liu, Thomas M. Webb, Juliana Ortiz-Castillo, Yunan Qin et autres

Electrodeposition of transition metals (TMs) is important for energy storage and sustainable metal production (such as ironmaking). Although M 2+ /M redoxes, including Fe 2+ /Fe, have been investigated in concentrated aqueous electrolytes, thermodynamic measurements and modeling of the equilibrium M 2+ …

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Two roads to lithium nucleation

Tao Gao, Yunan Qin

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Optimal sizing of battery energy storage systems for peak shaving and demand response using a degradation-aware Bayesian Optimization-Mixed-Integer Linear Programming framework

Jiwei Yao, Blake W. Billings, Tao Gao, John D. Hedengren et autres

• Degradation-aware framework co-optimizes energy storage systems’ size and dispatch. • Electrochemical model captures calendar and cycling aging impacts. • Stacked peak-shaving with demand response shift optimal system’s size. • Sensitivity sweeps reveal economic no-storage thresholds and sizing design charts. The increasing …

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High-Efficiency Low-Temperature Electrolytic Ironmaking in Acidic Environment Enabled by Novel Electrolyte Design

Tao Gao

Iron and its alloy is the second most-produced material by human society and is a pillar of modern society. However, the current ironmaking process is not sustainable due to the heavy use of fossil fuel as the reductant and energy source for …

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Cyclic Carboxylate-Based Electrolytes for High Voltage Sodium-Ion Batteries

Yunan Qin, Richard Johnston González, Seong-Gyu Choi, Tao Gao

High-voltage sodium-ion batteries (HV SIBs) are essential for enhancing energy density to a level comparable with commercial lithium-ion batteries (LIBs), thereby expanding their commercial applications. Conventional carbonate-based electrolytes fail to support stable cycling at 4 V vs. Na/Na⁺. This study explores cyclic …

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Experiments and Theory of Metal-Anion Complexation and Its Effect on the Thermodynamics and Transport Properties of Aqueous Electrolytes

Tao Gao

Electrolyte is a key component in an aqueous battery and it is responsible for ion conduction, interface stabilizing and dissolving the active materials in the context of flow batteries. In the past decade, concentrated electrolytes have emerged as a new family of …