I have worked on a wide range of engineering projects from product design, test engineering to battery design and manufacturing.

1. Engineering Project
Portfolio
Jiankun Pu
Georgia Institute of Technology
Department of Mechanical Engineering
Tel: (717) 693-4386
Email: kianpu34593@gatech.edu

2. Table Of Contents
No. Project Title Page
Measurement and Analysis of Flame Transfer Function in a Natural
Gas Turbine Combustor
1-21
ME4315 Design Project: HEV Battery Cooling System
3-42 Aluminum Oxide Composite and Carbon Nanotube-Based
Bifunctional Separators for High-Performance Lithium Sulfur
Batteries
5-63
Investigating Hybrid Organic-Inorganic Tin Perovskites for Li-Ion
Battery Applications: DFT Modeling Approach
7-84
On-going Project:
Measurement of Discharge Coefficient of Additive Manufactured
Effusion Bracket
9-105
Past Project:
Biomass Derived Carbon as Anode Materials for Li-Ion Battery
Application
11-126
7
ME4342 Computational Fluid Dynamics Project: Investigating the
Thermal Behavior of Various Large-Format Battery Tab Designs
13-14

3. Measurement and Analysis of Flame Transfer Function in a
Natural Gas Turbine Combustor
Apr. 2019 - Present
Research Project @ Ben T. Zinn Combustion Lab
1

4. Approach
Project Update
Role
The project aims to design a fiber-optical probe for
a natural gas turbine using the acoustical optical
technique to capture the chemiluminescence
intensity of the flame as a measure of the heat
release in the flame. By combining the
perturbations in the inlet flow, a flame transfer
function of this turbine will be develope to
quantitatively assess the susceptibility of
combustion to disturbances.
Objective
First, we designed and manufactured a sectional
combustor for the testing fuel injector. After
preliminary tests, a fiber-optical probe will be
designed and developed to integrate into the
sectional combustor.
• All components related to the combustor are
under manufacturing.
• Rig stand was assembled.
• Schedule first fire is in January.
Undergraduate Research Assistant
➢ Responsible for manufacturing and
assembling of the rig stand.
➢ Responsible for designing the fiber-optical
probe using existing instruments.
➢ Worked on the design of sectional combustor
and rig stand.
2Rig Stand CAD Model
Measurement and Analysis of Flame Transfer Function in a
Natural Gas Turbine Combustor

5. Aluminum Oxide Composite and Carbon Nanotube-Based
Bifunctional Separators for High-Performance Lithium Sulfur Batteries
Sept. 2019 - Present
Research Project @ Energy Storage and Conversion Lab
3
Powder
Slurry

6. Approach
Project Update
Role
This project is aimed to improve the performance of
lithium sulfur batteries (LSBs) by enhancing the
functionality of the separator. Specifically, this
project proposed to design a bifunctional
separator. This study can provide insights on
designing high performance stable LSBs as the
next-generation secondary batteries that can be
applied to various energy demanding products,
such as electrical vehicles and energy storage
system for solar and wind power plant.
Objective
A bifunctional separator will be fabricated to
improve the electrochemical energy storage
performance of LSBs. Coating facing towards
the Li metal anode will serve to suppress the
dendrite growth, while coating facing towards the
sulfur cathode will serve to capture and block
the polysulfide in the electrolyte.
A CR2032 coin-type cells, consisting of the Li
metal anode, bifunctional separator, and sulfur
cathode, will be assembled. The galvanostatic
charge/discharge test will be conducted to study
the cyclability.
• This project received the President’s
Undergraduate Research Award of Georgia
Tech.
• Comparison group of Li-S coin-type battery
using conventional polypropylene (PP) as the
separator are under testing.
Undergraduate Research Assistant
➢ Designed and wrote the proposal for this
project.
➢ Responsible for making the slurry and
assembling cell for both comparison group
and testing group.
➢ Assist the fabrication of the proposed
bifunctional separator.
4
Aluminum Oxide Composite and Carbon Nanotube-Based
Bifunctional Separators for High-Performance Lithium Sulfur Batteries

7. HEV Battery Cooling System
Sept. 2019 – Dec. 2019
ME4315 Design Project
5
Source: www.gm.com. General Motor.
Heat generation at the end of discharge
(discharge rate: 1.5C)
Temperature in the battery core without
cooling (discharge rate: 1.5C)

8. Approach
Results
Role
This project aimed to design an alternative battery
thermal management system to cool the battery
pack of Chevrolet Volt plug-in hybrid vehicle at a
discharge rate of 1.5 C of a single pouch cell
battery. Main components of the system include
battery packs which are consisted of NMC-LMO
pouch cells, the battery cooling plate, a vapor
compression system. For this work, two main
objectives were:
• An accurate thermal models of battery cell
that discharge at 1.5 C.
• An efficient cooling method that can maintain
the cells’ temperature at around 30°C.
Objective
The project broke down into three sub-
components. We first modeled the battery cell
based on an electrical-thermal coupled PDE using
COMSOL Multiphysics. Then the resulted heat
generation and temperature profile of the battery
were used to calculate the coolant outlet
temperature using the new cooling geometry.
Then, a vapor compression cycle was designed to
take out the heat in the coolant.
• The proposal and final report of this project
were both rated as the best out of more than
10 projects.
• The heat generation rate and the temperature
profile of the model were presented in the
previous page.
• During cooling, The battery core was kept
under 33 °C at minimum mass flow rate.
• At 35 °C ambient temperature, the COP of the
designed vapor compression cycle is 4.102
and the work of the compressor is 1.25 kW.
Lead Designer
➢ Responsible for thermal model calculation and
brazed plate heat exchanger design.
➢ Oversaw the overall design process to make
sure every component is designed correctly
and responsible for combining all components
together.
6
HEV Battery Cooling System

9. Investigating the Thermal Behavior of Various Large-Format
Battery Tab Designs
Aug. 2019 – Nov. 2019
ME 4342 Computational Fluid Dynamics Project
7
Electrical Potential Distribution on Positive
Electrode (discharge rate: 1.5C)
Electrical Potential Distribution on Negative
Electrode (discharge rate: 1.5C)

10. Approach
Results
The project aimed to investigate the thermal
behaviors of large format pouch cell batteries with
different tab designs using mathematical modeling
approach.
Objective
The math model was adopted from a literature. It
was first solved using COMSOL Multiphysics to
confirm the results. Then several different tab
designs were implemented in the model to
investigate the thermal behaviors.
• Pouch cell batteries with smaller tabs created
less amount of heat.
• The temperature distributions in the batteries
with smaller tabs were more uniform.
• From the study, we found that the best option
to design a pouch cell batteries was to
separate positive tab and negative tab to
opposite sides and to reduce the tab size as
much as possible.
8
Investigating the Thermal Behavior of Various Large-Format
Battery Tab Designs
Temperature Distribution in the Batteries
(discharge rate: 1.5C)

11. Measurement of Discharge Coefficient of Additive
Manufactured Effusion Bracket
Nov. 2018 – May 2019
Research Project @ Ben T. Zinn Combustion Lab
9
Effusion Bracket

12. Approach
Project Update
Role
The project aimed to design a versatile testing
equipment to accurately measure the discharge
coefficient for additive manufactured effusion
brackets in a bench test. The discharge coefficient
would be used to validate the theoretical value in
the research of an aero gas turbine.
Objective
A versatile testing equipment was designed using
SolidWorks to incorporate different forms of
effusion brackets.
• The design passed the final design review.
• The project is currently undergoing
manufacturing phase.
Primary Undergraduate Research Assistant – Lead
Designer
➢ Responsible for designing the testing
equipment.
➢ Responsible for running CFD test for this
equipment. 10
Measurement of Discharge Coefficient of Additive
Manufactured Effusion Bracket

13. Biomass Derived Carbon as Anode Materials for Li-Ion
Battery Application
Apr. 2019 – Aug. 2019
Research Project @ Energy Storage and Conversion Lab
11

14. Approach
Results
Role
This project aimed to investigate the cyclability of
biomass derived carbon in the application of Li-Ion
batter.
Objective
Slurry using biochar was made to assemble
CR2032 coin-type cells, consisting of the Li metal
cathode. The galvanostatic charge/discharge test
was conducted to study the cyclability.
• Although biochar is cheap and
environmentally friendly, but the performance
of the biochar as anode material for battery
application is limited.
Undergraduate Research Assistant
➢ Responsible for making the slurry for anode.
➢ Assisted on assembling cells and running
galvanostatic test.
12
Biomass Derived Carbon as Anode Materials for Li-Ion
Battery Application
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
0
100
200
300
400
500
600
700
800
Discharge
Charge
0
20
40
60
80
100
Capacity(mAhg-1)
Cycle number
CoulombicEfficiency(%)
Biochar 1

15. Investigating Hybrid Organic-Inorganic Tin Perovskites for
Li-Ion Battery Applications: DFT Modeling Approach
Apr. 2019 - Present
Research Project @ Computational NanoBio Technology Lab
13

16. Approach
Results
This work investigated organic-inorganic
perovskites that have the same structure as lead-
based perovskites (Specifically MAPbX3 (X=Br, Cl,
I)) but composed of different "A" materials such as
Cs and different "B" material such as Sn to address
the toxicity of lead-based perovskite materials.
These composites were believed to have similar
electrochemical properties but could greatly reduce
the impact to the environment compared to
MAPbX3.
Objective
DFT (Density Functional Theory) modeling
approach was used to study the perovskites
materials. Formation energy of pristine perovskites,
the volume change before and after Li+
intercalation and intercalation energy were studied
to evaluate the possibility as anode materials.
• CsSnX3 (X=Br, Cl, I) were found to have better
electrochemical properties then MaPbX3.
• This project was presented in 236th
Electrochemical Society and 2019 AIChE
Annual Meeting.
• A pipeline of research papers is to be
published in early 2020.
14
Investigating Hybrid Organic-Inorganic Tin Perovskites for Li-Ion
Battery Applications: DFT Modeling Approach
Role
Primary Undergraduate Research Assistant
➢ Investigated all MA based perovskites.
➢ Made the poster and presented in
conferences.