I-Yun Lisa Hsieh

National Taiwan University | NTU · Department of Civil Engineering

Wide deployment of electric vehicles (EVs) would greatly facilitate global de-carbonization, but achieving the emission targets depends on future battery prices. Conventional learning curves for manufacturing costs, used in many battery projections, unrealistically predict battery prices will fall below $100/kWh by 2030, pushing EVs to hit price pa...

China is in a fast-growing stage of mobility development, and its increasing demand for private cars comes with growing energy consumption and pollutant emissions. Uncertainty in Chinese parameterization of car ownership models makes forecasting these trends a challenge. We develop an application of the Monte Carlo method, conditioned on historical...

While vehicle electrification offers great benefits to society, mass-market adoption of battery electric vehicles remains a challenge owing to the long recharging times and limited recharging infrastructure. High opportunity costs tied to long recharging times are particularly problematic for commercial fleet operators. With an aim to improve the e...

China has recently enacted the dual-credit mandate to replace the existing subsidies as a continued effort to electrify its ground transportation sector. This study quantifies the impacts of such policy transition on private motorization rate and battery market. Throughout the next decade, affordability remains the determinant for vehicle purchases...

China is driving the transition away from internal combustion engine vehicles (ICEVs) to plug-in electric vehicles (PEVs, including plug-in hybrid electric vehicles (PHEVs) and battery electric vehicles (BEVs)) to address its pressing energy security and environmental pollution problems. The recent enactment of the dual-credit scheme mandate will c...

Strategies to sustainably transform road transformation often focus on electrification and environmental benefits. However, transportation is also intricately linked to socio-economic aspects of sustainable development and electrification poses its own challenges. This Voices asks: what actions are required to steer a clean, safe, efficient, and in...

Electrification is considered a key enabler for decarbonizing road transportation. Recently, increasing attention has been directed to the deployment of electric two-wheelers in cities across the globe. However, climate change mitigation potential across the diversity of today's available scooter models is still missing in the existing literature....

Vehicle electrification is recognized as a pathway toward net-zero emissions. However, it is unclear if the existing timeline for banning internal combustion engines is sufficient to meet the climate goal, especially for the regions where two-wheelers dominate road transport. We develop a novel bootstrap-based modeling framework to examine fleet tu...

Electric vehicles (EVs) are a promising pathway to providing cleaner personal mobility. China provides substantial supports to increase EV market share. This study provides an extensive analysis of the currently unclear environmental and health benefits of these incentives at the provincial level. EVs in China have modest cradle-to-gate CO2 benefit...

The promotion of plug-in electric vehicles (PEVs) is pivotal to China’s carbon neutrality strategy. Therefore, it is important to understand the vehicle market evolution and its impacts in terms of costs, sales, industry fuel economy, and PEV’s battery material demand. By examining vehicle technologies, cost, policy incentives, infrastructure, and...

Greater production volumes and improvements in manufacturing efficiency will drive down costs, but the prices will eventually stabilize as they get closer to the cost of the materials they are made of. A 2-stage learning curve model is developed to investigate how the essential materials, especially expensive elements (lithium, nickel and cobalt) u...