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Standard Lithium to Participate at Battery Next Summit in Boulder, CO on September 17, 2019

Marketing Announcement

Standard Lithium to Participate at Battery Next Summit in Boulder, CO on September 17,

2019

September 16, 2019 – Vancouver, BC – Standard Lithium Ltd. (“Standard Lithium” or the

“Company”) (TSXV: SLL) (OTC-Nasdaq Intl. Designation: STLHF) (FRA: S5L), announced that its

CEO Robert Mintak, will be joining host Sam Jaffe of Cairn ERA and other industry experts at the

Battery Next Summit, in Boulder, CO on September 17, 2019. Battery Next is a C-level summit

of top battery professionals and investors exploring the issues, solutions and technology

advances in advanced battery materials. Mr. Mintak will be participating in a session on next-

gen battery supply chain issues.

The purpose of Battery NEXT is to cultivate dialogue about problems, solutions and paths to

success in the advanced battery materials market. It’s meant for participants from throughout

the supply chain, from technologists to battery manufacturers to investors. In beautiful Boulder,

Colorado, attendees from throughout the battery supply chain will engage in focused discussions

on important emerging battery technologies, including silicon anode materials, solid electrolytes

and flow battery developments.

About Standard Lithium Ltd.

Standard Lithium (TSXV: SLL) is a specialty chemical company focused on unlocking the value of

existing large-scale US based lithium-brine resources. The Company believes new lithium

production can be brought on stream rapidly by minimizing project risks at selection stage

(resource, political, geographic, regulatory & permitting), and by leveraging advances in lithium

extraction technologies and processes. The Company’s flagship project is located in southern

Arkansas, where it is engaged in the testing and proving of the commercial viability of lithium

extraction from over 150,000 acres of permitted brine operations. The Company is currently

installing a first-of-its-kind Demonstration Plant that will use the Company’s proprietary

technology to selectively extract lithium from LANXESS’ tailbrine. This Demonstration Plant will

be used to prove commercial feasibility. The environmentally friendly process eliminates the use

of evaporation ponds, reduces processing time from months to hours and greatly increases the

effective recovery of lithium.

The Company is also pursuing the resource development of over 30,000 acres of separate brine

leases located in southwestern Arkansas and approximately 45,000 acres of mineral leases

located in the Mojave Desert in San Bernardino County, California.

Standard Lithium is listed on the TSX Venture Exchange under the trading symbol “SLL”; quoted

on the OTC - Nasdaq Intl Designation under the symbol “STLHF”; and on the Frankfurt Stock

Exchange under the symbol “S5L”. Please visit the Company’s website at

www.standardlithium.com.

Contact Information:

LHA Investor Relations, Mary Magnani, (415) 433-3777; [email protected]

On behalf of the Board,

Standard Lithium Ltd.

Robert Mintak, CEO & Director

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX

Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. This news release may contain

certain “Forward-Looking Statements” within the meaning of the United States Private Securities Litigation Reform

Act of 1995 and applicable Canadian securities laws. When used in this news release, the words “anticipate”,

“believe”, “estimate”, “expect”, “target, “plan”, “forecast”, “may”, “schedule” and other similar words or expressions

identify forward-looking statements or information. These forward-looking statements or information may relate to

future prices of commodities, accuracy of mineral or resource exploration activity, reserves or resources, regulatory

or government requirements or approvals, the reliability of third party information, continued access to mineral

properties or infrastructure, fluctuations in the market for lithium and its derivatives, changes in exploration costs

and government regulation in Canada and the United States, and other factors or information. Such statements

represent the Company’s current views with respect to future events and are necessarily based upon a number of

assumptions and estimates that, while considered reasonable by the Company, are inherentl y subject to significant

business, economic, competitive, political and social risks, contingencies and uncertainties. M any factors, both

known and unknown, could cause results, performance or achievements to be materially different from the results,

performance or achievements that are or may be expressed or implied by such forward-looking statements. The

Company does not intend, and does not assume any obligation, to update these forward-looking statements or

information to reflect changes in assumptions or changes in circumstances or any other events affections such

statements and information other than as required by applicable laws, rules and regulations.