R&D Process Engineer

Wanping Chen

Mobile: +1-607-***-**** Email: *******@*****.***

Address: *** ******** ***, ******** ****, CA

WORK EXPERIENCE

R&D Process Engineer

Yield Engineering Systems, Inc. Fremont, CA

2024 – Present

Advanced Microelectronic Packaging:

Led the hybrid bonding project for high-performance semiconductor packaging, focusing on metallization technology and plasma surface modification.

Led the stress management project on glass redistributed layers (RDL) using polymer/monolayer stress buffer layers, improving mechanical stability and process reliability.

Researched surface modification of ABF and glass substrates to enhance interfacial adhesion and bonding quality.

Collaborated with cross-functional teams to troubleshoot process challenges and optimize efficiency

Battery Cell Technology Engineer-Scientist

RadiSurf, Inc. Sunnyvale, CA

2023 – 2024

Designed and developed advanced liquid electrolytes for silicon-based lithium-ion batteries, enhancing stability, electrochemical performance, and cycle life.

Conducted failure analysis and process optimization to mitigate degradation mechanisms in next- generation battery materials.

Postdoctoral Associate

State University of New York, Binghamton, Binghamton, NY M.S. Whittingham Research Group (2019 Nobel Laureate in Chemistry) 2022 – 2023

Designed single-ion conducting polymers to improve ionic conductivity and enable high-energy- density lithium metal batteries, collaborating with industry partners to explore commercialization potential.

Studied first-cycle efficiency (1st CE) loss in high-nickel layered cathodes (NMC), identifying electrochemical and interfacial degradation mechanisms to enhance capacity retention.

Conducted thermal studies on state-of-the-art liquid electrolytes in full cells, half cells, and towards lithium metal anodes, utilizing advanced in-situ DSC techniques to evaluate thermal stability and safety

EDUCATION

PhD in Material Science

Institute of Chemistry, Chinese Academy of Sciences, China (2017 - 2022) Supervisor: Prof. Yu-Guo Guo & Prof. Sen Xin

• Developed ultra-thin hybrid polymer-ceramic electrolytes to enhance ionic conductivity and mechanical stability.

• Engineered thin-film solid electrolytes with asymmetric design to improve lithium-ion transport and dendrite suppression.

• Investigated Li+ transport mechanisms and interfacial stability for improved electrochemical performance.

• Explored the role of isotopic substitution in enhancing Li+ mobility in garnet-structured solid electrolytes.

• Utilized in-situ XPS techniques to analyze electrode-electrolyte interfaces and their impact on battery performance.

BSc in Engineering,

Beijing Jiaotong University, China (2013 - 2017)

BSc in Science,

University of Waterloo, Canada (2013 – 2017)

SKILLS

• Semiconductor & Packaging Processes: Plasma etching/cleaning, CVD deposition, Photolithography, Film lamination, familiar with advanced automation equipment

• Lithium Batteries: Hands-on expertise in the design and synthesis of solid electrolytes (organic

& inorganic); extensive experience in coin and pouch cell assembly and testing.

• Material Characterization: TEM, SEM, XPS, XRD, TGA, DSC, FTIR, Raman, UV-Vis, AFM, XRF, FSM, Peel test and advanced in-situ analysis techniques.

• Electrochemical Analysis: CV, EIS, LSV, charge/discharge testing, GITT, PITT.

• Data Analysis & Computational Tools: JMP, 2D/3D design software, Python, DFT, MATLAB.

• Cleanroom & Dry Room Experience: Skilled in operating within controlled environments for semiconductor and battery research

PUBLICATIONS & PATENTS

[1] W. P. Chen, H. Duan, J. L. Shi, Y. Qian, J. Wan, X. D. Zhang, H. Sheng, B. Guan, R. Wen, Y. X. Yin, S. Xin*, Y. G. Guo*, L. J. Wan, Bridging Interparticle Li+ Conduction in a Soft Ceramic Oxide Electrolyte, J. Am. Chem. Soc., 2021, 143, 5717-5726.

[2] H. Duan, W. P. Chen, M. Fan, W. P. Wang, L. Yu, S. J. Tan, X. Chen, Q. Zhang, S. Xin*, L. J. Wan*, Y. G. Guo*, Building an Air Stable and Lithium Deposition Regulable Garnet Interface from Moderate-Temperature Conversion Chemistry, Angew. Chem. Int. Ed., 2020, 59, 120**-*****.

[3] H. Duan, M. Fan, W. P. Chen, J. Y. Li, P. F. Wang, W. P. Wang, J. L. Shi, Y. X. Yin, L. J. Wan*, Y. G. Guo*, Extended Electrochemical Window of Solid Electrolytes via Heterogeneous Multilayered Structure for High-Voltage Lithium Metal Batteries, Adv. Mater., 2019, 31, e1807789.

[4] J. Wan, Y. X. Song, W. P. Chen, H. J. Guo, Y. Shi, Y. J. Guo, J. L. Shi, Y. G. Guo, F. F. Jia, F. Y. Wang, R. Wen*, L. J. Wan, Micromechanism in All-Solid-State Alloy-Metal Batteries: Regulating Homogeneous Lithium Precipitation and Flexible Solid Electrolyte Interphase Evolution, J. Am. Chem. Soc., 2021, 143, 839-848.

[5] J. Wan, Z. Zuo, Z.-Z. Shen, W.-P. Chen, G.-X. Liu, X.-C. Hu, Y.-X. Song, S. Xin, Y.-G. Guo, R. Wen*, Interfacial evolution of the solid electrolyte interphase and lithium deposition in graphdiyne- based lithium-ion batteries, J. Am. Chem. Soc. 2022, 144, 9354-9362.

[6] Y. J. Guo, P. F. Wang, Y. B. Niu, X. D. Zhang, Q. Li, X. Yu, M. Fan, W. P. Chen, Y. Yu, X. Liu, Q. Meng, S. Xin, Y.-X. Yin*, Y.-G. Guo*, Boron-Doped Sodium Layered Oxide for Reversible Oxygen Redox Reaction in Na-Ion Battery Cathodes. Nat. Commun., 2021,12, 5267.

[7] G. X. Liu, J. X. Tian, J. Wan, Y. Li, Z. Z. Shen, W. P. Chen, Y. Zhao, F. Wang, B. Liu, S. Xin, Y.-G. Guo, R. Wen*, Revealing the High Salt Concentration Manipulated Evolution Mechanism on the Lithium Anode in Quasi-Solid-State Lithium-Sulfur Batteries, Angew. Chem. Int. Ed. 2022, 61, e202212744.

[8] E. Wang, J. Wan, Y. J. Guo, Q. Zhang, W. H. He, C. H. Zhang, W. P. Chen, H. J. Yan, D. J. Xue, T. Fang, F. Wang, R. Wen, S. Xin, Y.-X. Yin, Y.-G. Guo*, Mitigating Electron Leakage of Solid Electrolyte Interface for Stable Sodium-Ion Batteries, Angew. Chem. Int. Ed. 2023, 62, e202216354.

[9] M. Fan, X. Chang, Y. J. Guo, W. P. Chen, Y. X. Yin, X. Yang, Q. Meng, L. J. Wan*, Y. G. Guo*, Increased Residual Lithium Compounds Guided Design for Green Recycling of Spent Lithium-Ion Cathodes, Energy Environ. Sci., 2021, 14, 1461-1468.

[10] H. Sheng, X. H. Meng, D. D. Xiao, M. Fan, W. P. Chen, Jing Wan, J. Tang, Y. G. Zou, F. Y. Wang, R. Wen, J. L. Shi* and Y. G. Guo*, An Air-Stable High-Nickel Cathode with Reinforced Electrochemical Performance Enabled by Convertible Amorphous Li2CO3 Modification, Adv. Mater., 2022, 2108947.

[11] Y. G. Zou, F. Meng, D. Xiao, H. Sheng, W. P. Chen, X. H. Meng, Y. H. Du, L. Gu, J. L. Shi*, Y. G. Guo*, Constructing a Stable Interfacial Phase on Single-Crystalline Ni-Rich Cathode via Chemical Reaction with Phosphomolybdic Acid, Nano Energy, 2021, 87, 106172.

[12] Y.-F. Tian, S.-J. Tan, Z.-Y. Lu, D.-X. Xu, H.-X. Chen, C.-H. Zhang, X.-S. Zhang, G. Li, Y.-M. Zhao, W.-P. Chen, Q. Xu, R. Wen, J. Zhang*, Y.-G. Guo*, Insight into Anion-Solvent Interactions to Boost Stable Operation of the Ether-Based Electrolytes in Pure-SiOx LiNi0. 8Mn0. 1Co0. 1O2 Full Cells, Angew. Chem. 2023, e202305988.

[13] S. Y. Zhang, Y. N. Zhou, L. Yu, M. Fan, W. P. Chen, S. Xin, Y. X. Yin, S. Xu*, Y. G. Guo*, O3- Type Na2/3Ni1/3Ti2/3O2 Layered Oxide as a Stable and High-Rate Anode Material for Sodium Storage. ACS Appl Mater Interfaces 2022, 14, 677-683.

[14] Ping Wang, Yu-Jie Guo, Wan-Ping Chen, Hui Duan, Huan Ye, Hu-Rong Yao, Ya-Xia Yin*, and Fei-Fei Cao*. Self-supported hard carbon anode from fungus-treated basswood towards sodium-ion batteries. Nano Research (2023), 16, 3832-3838.

[15] Jing Wan, Wan-Ping Chen, Gui-Xian Liu, Yang Shi, Sen Xin, Yu-Guo Guo, Rui Wen, Li-Jun Wan*, Insights into the nitride-regulated processes at the electrolyte/electrode interface in quasi-solid- state lithium metal batteries. J. Energy Chem. 2022, 67, 780-786.

[16] Ya-Hui Wang, Junpei Yue, Wen-Peng Wang, Wan-Ping Chen, Ying Zhang, Yu-Guo Yang, Juan Zhang, Ya-Xia Yin, Xing Zhang*, Sen Xin*, Yu-Guo Guo*, Constructing a stable interface between the sulfide electrolyte and the Li metal anode via a Li+-conductive gel polymer interlayer. Materials Chemistry Frontiers 2021, 5 (14), 5328-5335.

[17] Hai-Yan Hu, Yao Xiao*, Wei Ling, Yuan-Bo Wu, Ping Wang, Shuang-Jie Tan, Yan-Song Xu, Yu- Jie Guo, Wan-Ping Chen, Rui-Ren Tang*, Xian-Xiang Zeng, Ya-Xia Yin, Xiong-Wei Wu*, A Stable Biomass-Derived Hard Carbon Anode for High-Performance Sodium-Ion Full Battery. Energy Technology 2021, 9 (1), 2000730.

Patents:

[1] Y. G. Guo, W. P. Chen, S. Xin, J. L. Shi, H. Duan, Y. X. Yin; CN112234249A

[2] S. Xin, W. P. Chen, Y. X. Yin, Y. G. Guo; CN115295870A

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