Material for the Explanation Meeting on

the Business Creation Sector

April 16, 2024

Business Creation Sector

Mitsui Mining & Smelting Co., Ltd.

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Today's

Agenda

Participants and Materials

Name

Position

YASUDA Kiyotaka, Ph.D.

Senior Executive Officer and Senior General Manager of Business

Creation Sector

YAMAMOTO Takuya

Executive Officer and General Manager of Business Planning

Department, Business Creation Sector

Participants

NAKAHARA Yunosuke, Ph.D.

Director of the R&D Center, Business Creation Sector

SUZUOKA Kenji, Ph.D.

General Manager, SE Business Promotion Unit

FUJII Joji

General Manager, HRDP Business Promotion Unit

ANAI Kei

General Manager, AST Business Promotion Unit

Topic

Document pages

• Overview of the Business Creation Sector

PP. 2 to 6

[A-SOLiD®], a Solid Electrolyte Business for All-Solid-State

PP. 7 to 13

Batteries

• [HRDP®] Specialty Carrier Business for Next Generation

PP. 14 to 17

Materials

Semiconductor Packaging

• Cu Sinter Paste Business

PP. 18 to 19

• CO2 Capture and Reuse Business (R&D Center Case Studies)

PP. 20 to 23

• Owned Media "M-Lab" (Web Marketing & Open Innovation)

P. 24

Copyrights and Disclaimer

P. 25

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1

Overview of the

Business Creation

Sector

Positioning of the Business Creation Sector

Company purpose

Sector

mission

We promote the well-beingof the worldthrough a spirit of exploration and diverse technologies.

To be a "source" of the well-beingof the world. Three sentiments behind our mission: (1) Our company is a source of resolving issues to make the earth smile ≈ a starting point; (2) our sector is a source of company-wide businesses; and (3) the foundation of our competitive advantage is the intelligence of the source (material).

This is a sector of "Exploration"within Ambidexterity*, with priority allocation of management resources as a "Value Cultivation"sector within business portfolios.

Positioning of the Business Creation Sector

Ambidexterity

Business Portfolio Management

ExploitationExploration

Attractivemarkets

Circular economy

Next-generation electronics

Environment/ energy

Life science

Electronics

Mobility

Environment/ resource energy

Mobility Sector

Engineered Materials Sector

Metal Sector

Business

Creation Sector

Corporate Planning & Control Sector Portfolio reconfiguration/synergy-

nurturing functions

  • A concept of ongoing innovation and survival by implementing both Exploitation, the continuous pursuit of existing businesses, and Exploration, the development of new businesses.

Value Cultivation

Value Expansion

Business

New businesses

Businesses

●Copper foil

under focus

Creation Sector

sector

●Engineered powders

* Utilization of M&A

Engineered

Materials

Mobility

Sector

Business

Sector

Reconstruction

Metal Sector

Office

Value Transformation

Value Reinforcement/Optimization

Business Values

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2

Overview of the

Business Creation

Sector

History and Organization of the Business Creation Sector

In 2020, the Engineered Materials Research & Development Center and the New Business Planning Office under the Engineered Materials Sector were spun off into a new independent sector.

This new organization is autonomous and self-propelled, and handles everything from research and development to commercialization, having the internal strategic support functions necessary for business creation.

History of the Business Creation Sector

Organization Features

Engineered Materials Sector

Copper Foil Division

Engineered Powders Division

Engineered Materials Research

& Development Center

2020

New Business Planning Office

Established as a new

independent sector.

CVC

Value chain of the Business Creation Sector

Research

Development

Commercialization

Provision

Strategic support functions (DX, mass production technology, quality assurance,

intellectual property, accounting, human resources, etc.)

Company-wide assets

of value

External co-creation partners

(1) An autonomous, self-propelled organization

  • Handling of everything from R&D to commercialization
  • With strategic support functions for DX, mass production technology, quality assurance, IP, etc.

(2) A "market co-creation-type" business entity

  • Creation of new markets with external co-creation partners* The sector operates CVC for organic links with external assets.
  • Customers, universities, research institutions, suppliers, startups, equipment and complementary goods manufacturers

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3

Overview of the

Business Creation

Sector

Vision, Value, and Business Domain of the Business Creation Sector

We create markets one after another by leveraging our strengths and external forces.

Our business domain for 2030 are "Environment/Energy," "Next-generation Electronics," and "Life Science."

Vision

An exciting co-creation group

that explores the futurewith material

intelligence

Value

Excitement (Challenges)

Vitality (Work)

Wholeheartedly (Fun)

Environment/

Energy

Next-generation

electronics

Our

External

strengths

forces

Customers

Suppliers

Startups

Business Domain for

Universities,

2030

research institutions,

etc.

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Life science

AI technologies

Driverless

vehicles

Security

Circular economy

Space industry

Environment/Energy

Agriculture

Resources

Electronics

Mobility

Life science

Robot technologies

The world in 2050

4

Overview of the

Business Creation

Sector

Year 2030 Goals and Major Policies of the Business Creation Sector

We will actively invest management resources toward the goal of contributing to profits of 10 billion yen* or more in 2030 from our new business themes.

Major Policies of the Business Creation Sector

Policies

Management Resources

(1) Reinforcement of our R&D strengths

Expenses (hundred million yen)

- Increase the number of R&D personnel.

300

-

Promote DX application.

-

Promote external collaboration.

Year 2030 Goals

Profit contribution > 10 billion yen

Environment/Energy

CO

  1. Reinforcement of commercialization promotion - Increase the number of personnel for
    commercialization promotion.
    - Implement strategic investments.
  2. Enhancement of strategic support functions
  • Reinforce strategic support functions for production process development, IP, quality assurance, etc.
  1. Reinforcement of sector competitiveness - Promote the spread of MVV.
    - Enhance human capital.
  • Boost engagement.
  • Nurture global human resources, etc.

0

2016 Plan

2019 Plan

2022 Plan

Investments (hundred million yen)

100

0

2016 Plan

2019 Plan

2022 Plan

Personnel

500

0

2016

2019

2022

2025

2-

SErelated themes

Next-generation

electronics

HRDP

Cu paste Others

Portfolio reviews as needed

R&D

R&D

themes

themes

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* The levels of R&D activities are deliberated on a case-by-case basis

5

within the framework of company-wide management asset allocation.

A-SOLiD
Solid electrolyte

Overview of the

Business Creation

Sector

Concrete Case Studies (Cases Studies in the Environmental/Energy Sector)

To realize the well-being of the world, we are promoting a vast number of themes based on keywords such as a "carbon neutral society," "recycling-oriented society," and "society in harmony with nature."

Contribute to a carbon neutral society

  • Technologies that facilitate the transition to EVs and FCVs
  • Technologies that support a hydrogen society
  • Technologies that contribute to the reduction of GHG emissions

Blue: Themes to be

Commercialization

introduced today

HRDP

Special carrier for next generation semiconductors

Commercialization

Under

development

Contribute to circular economy

  • Technologies that contribute to energy and resource conservation
  • Materials that support material recycling and resource circulation

Collaborating

Methanol generation

from CO2

Contribute to harmonious coexistence

of nature and humans

Downsizing and energy

- Technologies that support the bioeconomy

conservation for chemical

processing

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Cu sinter paste for power semiconductors

Collaborating

Collaborating Commercialization of nuclear fusion technology

Industrial structure transformation driven by photosynthesis-based technology

6

Business

Explanation:

A-SOLiD®

Project Overview

Year 2030 Contribute to realizing a decarbonized society through all-solid-state batteries and become the leading company for solid

vision electrolytes.

Product Overview

Market Scale in the 2030s

Target markets

Value we proposition

Next-generation batteries: All-solid-state batteries

Safer and more comfortable

electric vehicles (EVs)

Expansion of potential battery

uses by increasing

environmental adaptability

(high/low temperatures, etc.)

Photo provided by Maxell,

Photo provided by LIBTEC

Ltd.

A-SOLiD®, a solid electrolyte

  • A powder sulfide solid electrolyte necessary for all-solid-state batteries
  • Argyrodite-typestructure with high ion conductivity and durability, and exhibits excellent properties for use in batteries

Market scale

EV applications

  • Commercialization of initial models to begin from the late 2020s
  • Potential widespread adoption and rapid market growth by the 2030s

Industrial/special applications

  • Commercialization of all-solid-state batteries for F/A by Maxell, Ltd.
    2024 will be the first year of all-solid-state battery commercialization.
  • Steady formulation of our own market for all-solid- state batteries

20252030

Widespread EVs

Initial EVs (high-end)

Industrial/special applications

2035 2040

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7

Business

Explanation:

A-SOLiD®

Features and Expected Value of All-solid-state Batteries

Compared to conventional liquid LiBs, all-solid-state LiBs offer a "wide temperature range for use" and "high safety." They are expected to provide value in terms of smaller sizes, quicker charging, and higher energy density.

Comparison of LiB Features

Composition

Form

Liquidtype

Refrigerant piping

Anode

Separator

Cathode

More than 70% is organic matter

Condenser

Limited working temperature

Cathode

range

Risks of leakage/combustion

Working Temperature Range

Battery Design

Cathodes: LMO, NCM,

-20°C

60°C

LFP

Anodes: Graphite,

LTO

All-solid-state

Anode

Solid electrolyte

Cathode

Provision of value

  • No use of electrolyte solutions (Composed of only inorganic matter)
    • Wider working temperature range
    • Lower risks of leakage/combustion
    • Rapid charging becomes possible

High level of safety

  • Smaller cooling space
  • Simplified BMS

Smaller and more

lightweight

-40°C

150°C

Potential of new materials

Cathodes: High-voltage cathodes

5V-class LNMO, etc.

Wider working temperature

Anodes: High-capacity anodes

Li metal, Si-types, etc.

range and improved heat

resistance

Rapid charging

High energy

becomes possible

density

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8

Business

Explanation:

A-SOLiD®

All-solid-state Battery Market Trends

We can expect the market to expand, as there are already practical applications that make the most of the features of all-solid-state batteries. Companies have been actively making efforts to achieve EV commercialization in the latter half of the 2020s.

Annual demand (MWh)

Market forecast per application for all-solid-state batteries

Commercialization of high-

Development of cylindrical

General

capacity ceramic packaged

all-solid-state batteries for

all-solid-state batteries

use in main power supplies

General, etc.

News release (7/25/2022)

News release (10/26/2023)

Compound annual

EVs

growth rate (CAGR):

341%

Striving to create an all-

Announced 44 billion yen

Announced prototype

EVs

solid-statebattery-powered

in investments in 2024

manufacturing facilities

vehicle in 2027 to 2028

R&D for EVs

News release (6/13/2023)

Business briefing (4/12/2022)

News release (4/8/2022)

(Year)

Space

Adopted by a semiconductor

Discharge/charge functions

equipment manufacturer

confirmed in space

Data source: Solid-State Battery 2021 | Report | www.yole.fr

News release (2/27/2024)

News release (8/5/2022)

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9

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Mitsui Mining & Smelting Co. Ltd. published this content on 20 May 2024 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 20 May 2024 10:06:49 UTC.